Deep in the jungle, the lost city of Tikal holds the dark secrets of the Maya, and now, a new investigation uncovers how it grew into a megacity home to 100,000 people, and why it was mysteriously abandoned.

New discoveries at a strange prehistoric site reveal the dark secrets and rituals of the mysterious people who built the world's largest stone circle, three times bigger than Stonehenge, and just as enigmatic.

The Nazca Lines are mysterious, alien-looking symbols carved into a remote desert more than a thousand years ago. New discoveries might finally reveal what these strange images mean and if they explain the disappearance of the people who made them.

Can Les Stroud survive a week in the Sonoran Desert alone, with no food, shelter or survival-gear - and just one bottle of water?

Les tries to survive seven days in the north of Baffin Island. A hunk of uncooked seal-liver, some oil-rich blubber for heat, a seal-hook, three matches and a knife is all he'll have to sustain himself for one very cold week.

Join Les Stroud as he's airdropped onto a snow-covered peak in the Canadian Rockies. He'll have to survive in the desolate environment for seven days using only his wits and a broken camcorder.

For a week Les Stroud will have to survive in a harsh snowy wilderness with only an axe, a multi-tool and a single blanket to aid him.

Stranded in the canyonlands of Utah, Les Stroud has only scavenged bike parts, a multi-tool, a magnesium flint-stick and an old energy-bar to help him survive for seven days.

With no food and a bare minimum of equipment, Les Stroud attempts to survive a week adrift in an inflatable life raft off the coast of Belize.

Les Stroud must survive a week in the boreal forest alone. Can he survive armed with just a handful of cashews and beef jerky, a solitary match and a multi-tool?

The swamplands of Georgia's Altamaha River basin are a primordial bog: dank, foreboding, and full of alligators. This environment will welcome filmmaker and survival expert Les Stroud for seven sweaty days and nights.

Marooned on Costa Rica's Osa Peninsula, Les Stroud has only a few items to aid him in surviving a week: swimming goggles, three ballpoint pens, a multi-tool and the clothing on his back.

Les Stroud strands himself in the Norwegian mountains to survive for ten days taking little food, no water or gear, and no safety or camera crew.

Les Stroud is stranded in the Norwegian mountains. Surviving for ten days, Les has no food supplies and little water. Alone and exhausted, Les tests the will to live like never before.

Les Stroud is shipwrecked on the desert island of Tiburon. With limited food supplies and no fresh water, Les scavenges to survive on the desert shore.

Les Stroud is shipwrecked on the desert island of Tiburon. Avoiding packs of wild coyotes, scorpions and rattlesnakes, he treks in-land in search of food, water and shelter.