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

This 80-year old mannequin is so lifelike it is believed to be an embalmed corpse.

At this Denver landmark, the meals are compulsory, the sopapillas are complimentary, and the insanity is everywhere.

Deadliest lake in the world suffocated over 1,746 people in one night.

The body of an unidentified woman, visible through a glass coffin, was discovered by accident.

An abandoned stretch of elevated road in the middle of the Brazilian jungle.

It's hard to believe the dizzying patterns covering this abandoned mine are completely natural.

This king penguin is a knighted brigadier of the Norwegian Army.

An exquisite tunnel of cascading flowers.

The world's first and only museum dedicated to dachshunds.

Former self-sufficient mental institution now a planned community.

It leads to a former hospital’s old root cellar.

Prison made famous by The Shawshank Redemption has been out of commission since 1990.

An art deco ice cream shop covered in vintage train station tiles.

The world’s highest ski resort was deserted after an 18,000-year-old glacier melted away.

Legend has it that this bronze orb, which sat atop an ancient Egyptian obelisk, once held the ashes of Julius Caesar.

The oldest surviving wooden bridge over Rhine lets travelers cross easily from Switzerland to Liechtensten.

A once-booming Mississippi River town with a history of racial violence is now eerie and mostly abandoned.

One of the steepest streets in the United States makes an intriguing challenge for cyclists.

This scenic waterfront swimming pool is the longest salt water pool in North America.

Brass bricks outline the locations of Edinburgh's lost, lively market stalls.

These remote Florida islands have a history of sea turtles and sunken treasures, and one of the world's largest coastal brick fortresses.

Get past the gatekeeper's apartment and enter an elaborate hoax of a restaurant with a Masonic feel.

Crypt mausoleum in cathedral's basement contains relics of third century Roman martyr, Saint Vibiana.