The Land Of The Giants is the Earth-like home planet of the Giants, an alien race of 72 foot tall humanoids almost wholly identical to human beings except for size. It is unknown if the planet has a name or just where it exists in the universe, but it has been shown the planet is accessed by some form of warp in space that traps ships and deposits them on the Giants home-world. Over several adventures, the survivors of the Spindrift realize the Giants are aware of Earth, Venus, and Mars, possibly having learned of them from survivors from Earth. Captain Steve Burton once claimed he saw Earth through a set of infrared goggles invented by the Giants, implying that the two planets are near enough to see one from the other, but it is unknown if he was telling the truth or making a hyperbole. (On A Clear Night You Can See Earth)

The Giant culture rather resembles life on 1960s

Barry's age is 10, Betty (middle name is Ann) is 22, Val (middle name is Ames) and Dan are 25, Barry's already widowed mother died two weeks ago, he is going to live with 3rd cousins he's never seen, Mark is 32, Steve may be 26. We will assume Fitzhugh is 50. Kurt was closer to 55 but we can assume the character was 50 (can't we?). Steve, 7 years out of Princeton, six foot, just transferred from the Chicago-Buenos Aries run. Dan built close to the ground at 5'10", 185 pounds, sidekick for the past 3 years. Betty holds top honors in stewardess rating, even disposition, a year in the states, three months on the Panama City run, she is geared for VIP flights. Slightly nervous newcomer but happy under any circumstances.