A scandalous Art Nouveau collaboration that set Paris all atwitter at the turn of the century.

This eclectic, mosaic-clad home includes a bamboo ping-pong loft and a "Whispermaphones" intercom.

DIY collection of eclectic holdings.

Meant to be one of the most extravagant hotels in the world, now an eerie, abandoned architectural gem in Mexico City.

A magical sinkhole on the Yucatán Peninsula is adorned with mini waterfalls and hanging vines.

A wunderkammer of gold and silver reliquaries and ancient saintly bones.

This mountain tram provides stunning views while hanging from a single, steel thread.

A Texas-sized particle collider that was abandoned due to its Texas-sized budget.

This underwater old Texas hill town only resurfaces during harsh drought.

The only international border marker within the United States.

Civil War dumping ground for the bodies of terrorized Union sympathizers.

Abandoned railroad tunnel is home to a colony of three million Mexican free-tail bats.

This small town Texas cemetery is said to be the burial site of a UFO pilot who crashed in the 1800s.

An oddities shop packed with twisted treasures inspired by Oscar Wilde and Edgar Allan Poe.

A mother's mourning for her lost son is remembered in this small park embedded with his memory.

The summer home of the largest colony of bats in the world.

One part antique store, one part curiosities hodge-podge.

An emerald-green grotto just a short trip from Austin.

A tribute to the little-known group of women who were the first ever to fly aircraft in the U.S. military.

A half-acre utopia in the New Mexico desert features a graveyard, a game of horseshoes, a library, and a mailbox.

Make a wish at what might be America's only Catholic shrine to a sinner.

Originally built as a promotional giveaway, this suburban house was designed to be an IRL version of the Simpson home.

One of the world's tallest Ferris wheels takes visitors high above Las Vegas in a spinning party room.

James Turrell's total color immersion art installation, hidden on the top floor of a luxury handbag shop.