The enchanting home of an eccentric Swedish physicist and author sits in the hills of Anacapri.

The glowing blue Nymphaeum of Emperor Tiberius.

A popular legend claims that the famous pizza was invented at a restaurant in this alley.

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

These "anatomical machines" are only one of the many strange items in this Italian crypt.

The red letters in the literary pavement leading to the library form a mysterious code.

Inside this former medieval prison is a collection of objects designed to inflict unbelievable pain and suffering on the human body and mind.

This narrow Ghent alleyway is an officially sanctioned street art tunnel.

The headquarters of the Mahanikai school of Buddhism, Thailand's largest monastic order.

Overlooked by many, the two famous Scottish warriors guard the main gate of Edinburgh Castle.

17th century streets hidden under Edinburgh were once a breeding ground for the black death.

Tintin's creator is celebrated in an immersive museum that's an astounding work of modern art.

Cozy basement bar sports an inventory of over 2,000 beers.

A Japanese shrine to dolls.

A Japanese corporation has turned this small island town into living modern art gallery.

Japanese island famous for poison gas and fluffy bunnies.

The 10,000 Torii shrine.

The sound of swaying stalks in this stunning grove has been named a governmentally recognized sound.

Five candy-colored villages on the Italian Riviera.

The only visible reminders of an elaborate engineering project that kept the tower from reaching the tipping point.

Two very green residential towers cleaning the air in one of Europe's most polluted cities.

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

Elaborate tile work in this railway station tells the story of Portugal.

A hidden three-foot-wide house separates these two regal churches.