Amalfi's pre-industrial history is slowly being engulfed by the lush vegetation of the Ferriere Valley.

Castle and secret tunnel withstood a siege until its owner was killed by the Holy Roman Empire, while sitting on the toilet.

After the musical legend's death, his memorial was mysteriously graffitied in gold.

A fiery crater has been burning in the Karakum Desert since 1971.

Rumors of the occult haunt this upscale 1920s hotel.

This medieval hilltop village was abandoned at the end of the 19th century, after existing for more than 500 years.

The Roman city was the birthplace of various emperors and is home to one of the empire's most impressive architectural feats.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

A masterpiece of LGBT art has been restored in what may now be the most valuable restroom in America.

Tucked along a river are enigmatic stone carvings created thousands of years ago.

The corner walls of a primary school showcase a Mexican version of memento mori.

This concrete amphitheater offers an unforgettable view of one of Mexico's most beautiful canyons.

This historic cemetery built for victims of the epidemics that swept Guadalajara is shrouded in macabre tales.

This singular Mexican structure is considered a masterpiece of the Tapatía architectural school.

The jewel of western Mexico's archaeological legacy is this tiered circular pyramid now covered in grass.

Just your average Marie Antoinette–themed speakeasy in an abandoned 19th-century subway tunnel.

This bridge over the River Cuale leads to a neighborhood that was once an escape for Hollywood's elite.

One of the last remaining covered bridges in the province of Ontario.

This quaint Italian town keeps losing ground as the sides of its plateau slowly erode.

The tombstone of an unfortunate explorer who disappeared in the Paris Catacombs.

Over 3 miles up in the Himalayas this pass is one of the highest drivable roads in the world.

This hidden Art Nouveau courtyard is an opulent feast for the eyes.

An alchemist's "magic door" stands in the middle of a Roman park.

This magnificent 18th-century hall consists of a maze of nearly a thousand interconnected passages.