Two explorers burrow deep into the planet’s crust and emerge in a savage land inside a hollow Earth, where they have many adventures.

A young naval officer finds himself in a forbidden part of the world after storms waylay his ship.

An adventurer returns to the hollow interior of the Earth in search of his lost love.

Tara, Princess of Helium and daughter of John Carter, finds life-threatening adventure in thrilling far-off regions of Barsoom.

John Carter returns to Mars to try and determine the fate of his lost love Dejah Thoris.

Stranded U-boat survivors and their rescuers contend with dangerous beasts and prehistoric people in a strange lost world.

A young man travels to the moon with a group of companions and discovers that it’s inhabited; in subsequent centuries, reincarnations of the same man deal with an invasion of the Earth by the malevolent inhabitants of the Moon.

John Carter, an Earth-man transported to Mars, must rescue his beloved princess from imprisonment in the Martian Temple of the Sun.

When the beautiful Princess Thuvia of Ptarth is kidnapped, suspicion falls on John Carter’s son Carthoris, who sets out to rescue the woman he loves.

Four men become the first humans to travel to other galaxies.

Three scientists from Earth invent space travel and meet extraterrestrial life, but then must defend the solar system from a new threat.

A scientific expedition stumbles upon the remnants of Atlantis.