A museum of carnival attractions where you are invited to ride the rides.

This morbid, delightful curiosity shop offers everything from animal bones to human teeth.

A semi-scholarly approach to sex.

The very center of Paris is surrounded by a bevy of strange good luck rituals.

Stalactites and stalagmites in a beautifully lit cave.

Home to items never before seen by the public.

In the middle of an extremely unforgiving and desolate high desert is the most secret military facility in the world.

The only swimming pool listed on the National Register of Historic Places is emptied and refilled each day with naturally filtered water.

A stunning, two-tiered waterfall made famous by poets, artists and the legend of a ghost dog.

The beautiful baroque library of the Hapsburg empire.

Carved by a waterfall in a hard-to-reach rock formation, this heart-shaped rock has inspired romantics for decades.

A gargantuan crystal kingdom.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

An underwater city for the dead.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

One person's lost luggage is another person's treasure.

An ethereal glowing blue ocean cave in Croatia.

The abandoned husk of a mental institution that failed to save a Jazz Age icon still sits nearly unchanged.

The world's only international cryptozoology museum is host to an unrivaled collection of mysterious objects.

The oldest cemetery in New Orleans, resting peacefully for over 200 years now.

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

An homage to everyone's favorite prehistoric cartoon family.

Its buzzing collection honors vibrator history.

This volcanic cave lake is essentially hard proof that Iceland is the most magical place on Earth.