The hallucinogenic center of the ancient world.

After much poking and prodding, this island is decidedly not a magnetic anomaly, but it sure is pretty.

WWI hospital ship lost in a cyclone turns up on the coast of Fraser Island, where she remains rusted and forgotten.

Huge standing stones mark a site of megalithic mystery.

This ancient Irish religious site is covered in ancient carvings, many of which have barely aged.

The ancient tomb acts as a calendar that keeps perfect time.

A massive underwater sinkhole made famous by Jacques Cousteau.

No telescopes, no power, no gift shop: The Observatory of Chichen Itza, one of the world's oldest observatories, takes astronomy back to basics.

Send a postcard while vacationing with Satan.

See massive fossils that are over 200 million years old in northeastern Arizona.

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

Some of the tallest ancient American ruins continue to inspire awe and curiosity.

Ancient pueblos built into the base of a natural canyon wall.

The largest earthwork effigy in the world.

The largest ancient burial mound in Ohio.

The largest burial mound in the United States holds the remains of prehistoric West Virginians.

Despite its lavish ornamentation, and wholesome lifestyle of its devotees, this mountain commune has faced its share of issues.

The largest university building in the West is a gothic masterpiece containing dozens of theme rooms based on different countries.

Eccentric concrete mansion and museum designed and built by hand from the inside out.

The world’s first penitentiary, meant to be humane, drove men insane.

Copenhagen's celebrated theme park and gardens.

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.

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

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."