Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

This amazing pedestrian suspension bridge in the Swiss Alps would give Indiana Jones nightmares.

Caves famous for the dragon-slaying saint who lived there.

The bizarre visions of H.R. Giger, tucked away in a Swiss medieval city.

This raised bulls-eye visible from space was the subject of an intense geologic controversy.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

A stray meteor left this picturesque hole in the Australian outback.

The world's largest impact crater is mainly eroded but still remembers the planet's violent history.

A lake in the middle of the tundra of Quebec is said to be the purest freshwater lake on Earth.

The meteor that sealed the fate of the dinosaurs landed at this site, one of the largest impact craters in the world.

A meteorite-bounded town in Bavaria.

This isthmus in the Bahamas narrowly separates the roiling Atlantic from the cool Bight of Eleuthera.

A naturally occurring tunnel in this Nordic mountain makes it look like it's been shot.

The highest peak in Wales is said to be the final resting place of a giant killed by King Arthur.

Walk 2,300 feet above the ground on the "Troll's Tongue."

Monuments don't get much more metal than these three giant viking swords planted in a Nordic hill.

This giant boulder is pinched over a 1000-meter abyss by two mountains.

This "preacher's pulpit" once used for pagan ritual, is home to a new, and dangerous ritual.

This singular broken monument, now housed in a museum, was the cause of a worldwide "Mayan Doomsday" phenomenon.

The palace of the King of Kings, burned by Alexander the Great.

Rebuilt remains of a temple to Roman god Mithras.

Mysterious craters may have been home to an ancient cult.

A deadly ancient portal to the underworld.

Resonant stone, that has been played since prehistoric times.