A collection of the best toys ever made, The National Toy Hall of Fame is filled with kids, fun, and for some reason, a bird preserve.

World's largest herd of white deer populate a former U.S. Army depot.

Former utopian colony based on the belief that the universe exists in a hollow sphere.

Live a night as a Byzantine King, with a minibar and private jacuzzi.

A marvel of Byzantine engineering under the streets of Istanbul.

Once the home of a hermetic monk, this cave now houses a small church.

The mummified right fist of a 1,000-year-old saint-king sits inside an ornate golden reliquary.

Budapest's Communist-era statues, banished to the suburbs.

For centuries young Thai men used this Giant Swing as a slingshot to heaven.

A treasure trove of pathological, forensic, parasitological, and anatomical specimens.

Believed to have once stored either human remains or rice wine, thousands of mysterious stone jars lie in ruin.

Go inside to really appreciate this 500-year-old technological masterpiece.

A unique underground structure dating back to the 1st century BC.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

These mysterious ancient stone spheres were created by a civilization lost to time and are now mostly lawn ornaments.

The youngest volcano in Central America.

Guatemalan womanizer, venerated during Holy Week.

A Mayan village preserved for centuries in volcanic ash.

Central America's deepest lake is actually a volcanic caldera, surrounded by three volcanoes.

A massive underwater sinkhole made famous by Jacques Cousteau.

Jail from the 19th century that was built by inmates.

A beautiful geyser under environmental threat.

Paranormal experiences in this hotel's room 217 led Stephen King to write "The Shining."

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