These tombs were built into the side of a mountain so that ancient angels could reach the dead.

An ancient fortified mound raised over the millennia from settlements built one on top of the other.

The sacred shrine of the Yazidis.

This ancient city—home to nine civilizations—is soon to be buried under 200 feet of water.

Balanced on four stone pillars, this historic tower was the site of a tragic political assassination.

Mausoleum and Holy Seat of Antiochus I of Commagene.

The floor of the oldest surviving synagogue in the Americas is entirely covered in sand.

An abandoned guano-mining city in the South Pacific.

A giant can of fruit cocktail is all that remains of what was once the world's largest cannery.

A four story, football field-sized, nine-grotto creation made of shells, minerals, and rare stones.

A music-filled, booze-soaked oasis in the desert.

A fake town founded by Western movie stars is now becoming a hip desert community.

A regular looking rock with an unbelievable history.

Abandoned hotel with adjacent lake and golf course.

The "3rd largest" city in California is an empty mirage of suburbia in the middle of nowhere.

Megachurch turned Catholic church comprised of 10,000 glass panes.

Sites connected to a woman born on a ship and spared by a pirate.

A crumbling cathedral condemned by an earthquake.

Every equinox this Maya pyramid puts on a spooky ancient light show.

A flooded Mexican cave that hides a river beneath the water.

Oldest building in California still in use.

Two massive rock outcroppings on the Oregon coastline.

Stroll through a wonderland of stupendous moss-covered trees.

This expansive bridge in the Canadian wilderness was originally just built for friends.