This Armenian monastery was carved out of cliffs and named after the spear used to stab Jesus.

The most visited pilgrimage site in Armenia once held a saint in a pit for 13 years.

A geological oddity topped with a 2,000-year-old pagan temple.

Where animatronic singing fish go to retire.

The Old Mill shown in the opening credits of “Gone With the Wind” is actually fairly new, and was never a mill at all.

A mysterious light floating in the trees of Arkansas may be a piezoelectric effect.

In a country where driving from one town to another is literally impossible, this small stretch of gravel is a remarkable feat.

Giant reed houses made in the marshes of Southern Iraq.

Ancient rock-cut tomb? Definitely. That of a great Median king? Unlikely.

This beautiful arched gate is all that remains of the fortress the ancient mountaintop town of Amadiya once was.

Celebrated as a center of civilization, the remains of the ancient city have been nearly destroyed by greed, egoism, and war.

An unusual "skull with ears" sits in the crypt of this small church tucked away at the end of a narrow alley.

This magical-looking island is notorious for the misfortunes suffered by its owners.

An underground paleo-Christian burial site composed of the remains of several cemeteries and Basilicas.

This shining multicolored metro station deep under Naples is said to be the most beautiful in Europe.

A labyrinth of ancient tunnels hidden below the city holds the ruins of 2,500 years of history.

The once forbidden "secret cabinet" of erotic art from excavations of Pompeii and Herculaneum.

A two-way chairlift system between Zugliget and the highest point in the city.

A fake Transylvanian castle houses a cathedral of antlers.

This hidden art nouveau gem was designed by an architect in search of a national style.

This quaint Hungarian railway system is operated exclusively by children between the ages of 10 and 14.

Possibly the world's largest hourglass only needs to be reset every New Year's Eve.

This Hungarian castle was built out of cardboard and wood until it proved so popular that it got upgraded to stone.

A series of caves under Castle Hill that once held the prisoner Vlad Tepes, better known as Count Dracula.