The stones of this Incan wall complex fit together so well you couldn't fit a piece of paper between some of them.

A devastated ruin in the south of Belize where British explorers claimed to unearth the Mitchell-Hedges Crystal Skull.

This temple to the sturm and drang of Richard Wagner contains a dragon's cave and reptile zoo full of living "dragons."

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

This crumbling headstone commemorates the first death by tiger in Britain's history.

A small abandoned and abused cemetery that has become a magnet for ghost hunters.

The oldest continual pilgrimage site in Britain was supposedly created by a gruesome beheading.

A swamp that was the site of prehistoric water burials also managed to preserve its corpses for millennia.

A remarkably intact castle that once was the largest in Ireland.

Gladiators battle and chariots race daily in the ruins of a once-great Roman city.

A cave dwelling that was started by the Celts, expanded by monks, and finished by knights.

The quintessential Japanese rock garden has existed for more than 500 years.

A beautiful bamboo trail tucked in this famous Japanese Shrine.

The 10,000 Torii shrine.

Europe's largest prehistoric mound – burial site of a legendary king?

Mysterious rocks that ring musically when struck.

An abandoned Incan construction project left behind a mysterious "doorway."

A sculpture made of 10 Cadillacs as a monument to the "Golden Age" of the American automobile.

Where hills of dirt conceal the burial ground of one of the most powerful ancient Native American societies.

An ossuary built in 1210 to collect bones from the Ospedale Maggiore of Milan.

One of Savannah's oldest and most haunted cemeteries, featuring graves desecrated by Sherman's Union Army.

A lake with hundreds of ancient skeletons surrounding it. The surprise is what killed them.

100 year tradition of fist fights, marked by marble footsteps.

The mummified relic of St. Catherine sits forever on a golden throne.