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

The highest tides in the world come in and out here twice a day, allowing you to essentially walk along the ocean floor.

Dead weights honor the dead of Portugal's fishing industry.

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

A century-old tradition has culminated in a small but singular collection of feline effigies.

One New Hampshire alleyway has become home to a public gallery of feline art.

A curious little museum dedicated to the furry feline in the cat haven that is Old Town Kotor.

A library and museum dedicated to typography.

The site of a classic series of Laurel and Hardy pratfalls.

A sign at the end of the Santa Monica Pier marks the traditional end of the legendary American highway.

A world-class observatory in the California desert.

The final resting place of a space program monolith.

The ghost town that ended up on Ebay.

One of the most scenic stretches of road in America winds between some of the country's oldest trees.

A walk-in working camera obscura produces 360-degree live images of the San Francisco coast.

The ghostly remains of an accidental sea.

Remants of foundations, streets, and streetcar tracks inhabit the cliffs where a landslide occurred in 1929.

A one-of-a-kind collection of a unique medium.

An artsy hidden staircase leads to breathtaking views of San Francisco.

A walkable map of the world, made from soil and stone by one man.

An abandoned horror film set sits eerily along a highway through Hollywood's "door to the desert."