Best movies like Unknown World

A woman leads an expedition into a remote jungle to find her long-lost brother, but instead finds a mad scientist who has created a fungus monster that feeds on the local inhabitants.

Searching for the lost world of Atlantis, Prof. Aitken, his son Charles and Greg Collinson are betrayed by the crew of their expedition's ship, attracted by the fabulous treasures of Atlantis. The diving bell disabled, a deep sea monster attacks the boat. They are all dragged to the bottom of the sea where they meet the inhabitants of the lost continent, an advanced alien race that makes sailors their slaves.

Four astronauts returning from man's first mission to Mars enter a time warp and crash on a 26th Century Earth devastated by atomic war. At first unaware where they are, but finding the atmosphere safe to breathe, they start exploring and find themselves in a divided future where disfigured mutants living like cavemen inhabit the surface, while the normals live comfortably below the surface but are dying as a race from lack of natural water, air and sunlight.

With his assistant, Laura Hutchinson, Dr. David Conway develops a device to advance the fledgling science of earthquake prediction. After forecasting a large trembleor that will rock California within twenty-four hours, Conway cannot persuade the Governor to act. When the prediction proves true and further tests indicate that there are more quakes to come, Conway and Laura seek to perfect their device. Subsequent tests deep within Carlsbad Caverns discover an unknown element—E-112—that is responsible for the earthquakes and threatens to destroy the globe if it ever reaches the surface. The team determines that with only four weeks until Armageddon, the race is on to neutralize the killer element before it takes a devastating toll.

Stranded on Mars with only a monkey as a companion, an astronaut must figure out how to find oxygen, water, and food on the lifeless planet.

Atomic scientist/pilot Doug Martin is missing after his plane crashes on an reconnaissance mission after a nuclear test. Miraculously appearing unhurt at the base later, he is given sodium amethol, but authorities are skeptical of his story that he was captured by aliens determined to conquer the Earth with giant monsters and insects. Martin vows to use existing technology to destroy them.

James Cameron teams up with NASA scientists to explore the Mid-Ocean Ridge, a submerged chain of mountains that band the Earth and are home to some of the planet's most unique life forms.

When an asteroid threatens to collide with Earth, NASA honcho Dan Truman determines the only way to stop it is to drill into its surface and detonate a nuclear bomb. This leads him to renowned driller Harry Stamper, who agrees to helm the dangerous space mission provided he can bring along his own hotshot crew. Among them is the cocksure A.J. who Harry thinks isn't good enough for his daughter, until the mission proves otherwise.

A huge burrowing machine tunnels out of control at ferocious speed, cutting clean through to the center of the earth, to the twilight world of pellucidar. Once there, Dr. Perry and David Innes are threatened by half human creatures, lizard-like birds, and man-eating plants.

A group of scientists travel to a remote island to study the effects of nuclear weapons tests, only to get stranded when their airplane mysteriously explodes. The team soon discovers that the tests have given rise to crabs mutated into intelligent, impervious, telepathic giants intent on increasing their numbers by breeding, then travelling to populated areas to feed, and which do not intend to be stopped by their discoverers.

Dr. John Beck, recently married, decides to take his wife, Cathy, spelunking in Carlsbad Cavern. While there, Dr. Beck, who specializes in bats, is bitten by a fruit bat. He is then, inexplicably, transformed into a vampire bat. While he escapes and seeks help from another doctor, it is clear the treatments are not working. In fact, they are aggravating his condition. Dr. Beck unwittingly goes on a killing spree, catching the attention of Sergeant Ward.

A young woman in Paris goes to a party in the enormous labyrinth of limestone tunnels beneath Paris. When she becomes separated from her friends, she is convinced something is chasing her through the dark tunnels.

A man with an unknown disease travels to an island with his girlfriend where his relatives once lived, hoping to find a cure to his illness. Although his relatives were all thought to be dead, he finds them living underground.

When scientists exploring the Amazon River stumble on a “missing link” connecting humans and fish, they plan to capture it for later study. But the Creature has plans of his own, and has set his sights on the lead scientist's beautiful fiancée, Kay.

In the early hours of the night, young David Maclean sees a flying saucer land and disappear into the sand dunes just beyond his house. Slowly, all of the adults, including his once loving parents, begin to act strangely.

While on a fishing trip, Harry Baldwin (Ray Milland) and his family hear an explosion and realize that Los Angeles has been leveled by a nuclear attack. Looters and killers are everywhere. Escaping to the hills with his family, he sets about the business of surviving in a world where, he knows, the old ideals of humanity will be first casualties.

When the cable breaks on their diving bell four people find themselves trapped in a hidden underwater world.

When an experimental atomic rocket crashes somewhere off-radar, its three developing scientists are joined by three Air Force men in tracking it down to a small Pacific island, where it apparently has landed on the plateau of the island's steep-walled, taboo mountain...

Spies hold the son of a nuclear physicist (Gene Barry) hostage in exchange for the Los Alamos bomb formula.

Distraught, confused, and half-wild with fear, Sarah Carter emerges alone from the Appalachian cave system where she encountered unspeakable terrors. Unable to plausibly explain to the authorities what happened - or why she's covered in her friends' blood - Sarah is forced back to the subterranean depths to help locate her five missing companions.

Four scientists and a newsman crash land on Mars and meet martians who act friendly.

The villainous Dr. Fu Manchu races against a team of Englishmen to find the tomb of Ghengis Khan, because he wants to use the relics to cause an uprising in the East to wipe out the white race.

Scientists mount an expedition to find a Bigfoot-type creature.

Mysterious and unearthly deaths start to occur while Professor Saxton is transporting the frozen remains of a primitive humanoid creature he found in Manchuria back to Europe.

Unfazed by ridicule from fellow scientists, professor Challenger (John Rhys-Davies) leads an expedition to investigate rumored sightings of prehistoric life still thriving in the unexplored African jungle. He's joined by a thrill-seeking journalist, his archrival and a beautiful adventurer on a perilous trek through mysterious and uncharted territory, filled with danger and deception. David Warner, Eric McCormack and Tamara Gorski co-star.

Dr. Leon Kravaal develops a potential cure for cancer, which involves freezing the patient. But an experiment goes awry when authorities believe Kravaal has killed a patient. Kravaal freezes the officials, along with himself. Years later, they are discovered and revived in hopes that Kravaal can indeed complete his cure. But human greed and weakness compound to disrupt the project.

A party of archaeologists discovers the remnants of a mutant five millennia-old Sumerian civilization living beneath a glacier atop a mountain in Mesopatamia.

A test rocket carrying wasps to outer space, to study the effects on them of weightlessness and radiations, crashes out of control back to Earth, into the jungles of Africa. The two astrobiologists in charge of the test mount an expedition to the Darkest Continent to retrieve their experiment, only to find the wasps have grown to giant size which are panicking all forms of life as they quest for food.

An expedition in the South Pacific lands on a tropical island where the natives worship the mysterious deity Gappa. An earthquake opens up an underground cavern and a baby reptile is discovered inside. The natives warn the foreigners to leave the hatching alone, but they don't listen and take it back to a zoo in Japan. Soon after, moma and papa Gappa start smashing Tokyo looking for their kidnapped child.

Leo Vincey, told by his dying uncle of a lost land visited 500 years ago by his ancestor, heads out with family friend Horace Holly to try to discover the land and its secret of immortality, said to be contained within a mystic fire. Picking up Tanya, a guide's daughter, in the frozen Russian arctic, they stumble upon Kor, revealed to be a hidden civilization ruled over by an immortal queen, called She, who believes Vincey is her long-lost lover John Vincey, Leo's ancestor.

Seven women from different backgrounds, nationality, age, class, and marital status find themselves in New Guinea, February 1942 - when the Japanese army takes over unexpectedly, and sends them into a war camp in the jungle.

South Sea freebooters fight for hidden treasure and the love of the beautiful Luana.

A wealthy woman funds an underwater expedition to explore for marine life, but what she doesn't know is that her "colleagues" have other intentions.

When her archaeologist father disappears on an expedition, Wanda sets out to look for him. What she finds is a secret underground world, where no one believes in life on the surface and where she and her father are taken for spies.

When the ancient continent of Mu sank beneath the ocean, some of its inhabitant survived in caverns beneath the sea. Cowboy singer Gene Autry stumbles upon the civilization, now buried beneath his own Radio Ranch. The Muranians have developed technology and weaponry such as television and ray guns. Their rich supply of radium draws unscrupulous speculators from the surface. The peaceful civilization of the Muranians is corrupted by the greed from above, and it becomes Autry's task to prevent all-out war, ideally without disrupting his regular radio show.

Under the border leading into Mexico, within a labyrinth of caves, a deadly presence haunts all who enter. For four friends on an expedition, the caverns become an underground graveyard as the tortured ghosts prey upon them, one by one.

David and his adventurous group of friends embark upon a caving expedition within the deep and treacherous Shankali Caverns of India. As the group descends deep into the caves, they discover they have trapped themselves within the breeding den of giant black centipedes.

A chance meeting leads two former college friends into a search for sunken treasure, a search which involves them with the double dealing Landers, supporter of their expedition treasures is discovered, but Landers traps them in an underwater cave.

A scientist who has been preserved in suspended animation wakes up to find himself in a primitive society in the future.

An American scientist tells two colleagues about the finding of an abominable snowman living in the Japanese alps, where it is worshipped by a remote tribe as a god, and how it was discovered by modern man after it raided a ski-ers' shelter following an avalanche, killing all inside. This is an adaptation of the Japanese film Ju Jin Yuki Otoko with added American-made footage, narration and music track.

Los Angeles is about to be hit by a devastating earthquake, and time is running out to save the city from imminent danger.

A NASA Arctic expedition designed to be the first Martian road trip on Earth becomes an epic two-year odyssey of human adventure and survival.

Adventure drama during WW2 in Italy where a mixed group of people get trapped inside a cave after a bomb raid. But can they co-operate? And will they survive?

The documentary recounts the world's first nuclear attack and examines the alarming repercussions. Covering a three-week period from the Trinity test to the atomic bombing of Hiroshima, the program chronicles America's political gamble and the planning for the momentous event. Archival film, dramatizations, and special effects feature what occurred aboard the Enola Gay (the aircraft that dropped the bomb) and inside the exploding bomb.

David Attenborough sets out on a journey across the seven continents in search of the most impressive and inspiring natural wonders of our planet.

NGC goes inside one of the greatest natural marvels on the planet - a giant crystal cave described as Superman's fortress, with magnificent crystals up to 36 feet long and weighing 55 tons. A team of experts venture into the cavern, enduring scorching-hot temperatures that could kill a human after just 15 minutes of exposure. They'll push the boundaries of physical limitation to explore a crevasse that could lead to another - and perhaps more spectacular - crystal cave.

The movie follows the perspective of several characters (such as Japanese victims, soldiers, American prisoners of war and others) and how they lived or tried to survive the effects felt during the aftermath of the Atomic Bomb dropping by the Enola Gay at Hiroshima, during World War II.

The Three Mesquiteers are forced to track down a train robbery ring after some of the gang hijack their truck for a getaway and the police conclude they are part of the gang, an identification which is just fine with the gang's nameless chief.

A group of twelve international scientists are the first to land on the moon. In their exploration of the surface, they run into all kinds of trouble, including threatening messages from alien life forms residing on the moon. Just a short nine years before the historic moon landing, this film's understanding of the science of space exploration is fantastically simplistic, but this well-made science fiction film holds interest with a strong cast and intriguingly strange events, photographed with great style by John Alton. Ken Clark, Michi Kobi, Tom Conway, John Wengraf, and Robert Montgomery Jr. portray the intrepid scientists.

Explore how one man's relentless drive and invention of the atomic bomb changed the nature of war forever, led to the deaths of hundreds of thousands of people and unleashed mass hysteria.