An institution that preserves the history of institutionalization.

Erosion and time have created a naturally-formed water park.

One of the world's tallest waterfalls wasn't revealed to the world at large until 2006.

Known for the tunnel that leads visitors to the water.

Fascinating museum dedicated to the under-appreciated medical history of urology features some wince-inducing devices.

Its buzzing collection honors vibrator history.

The end of times arrives, at least for the fish in the O.C. Fisher Reservoir.

At this exhibit on the world of poison, venomous animals steal the show.

A store full of vintage and indie toys designed to bring out the kid in even the crustiest of adults.

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

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

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

An encyclopedic collection of mammal penises.

On the Oregon coast there is a natural hole that seems to be draining the sea.

The most powerful waterfall in all of Europe.

The mysterious, fantastical woodland inspiration for "The Lord of the Rings."

Since 1874, this macabre collection has developed into a museum devoted to Scotland Yard's mementos of dastardly deeds.

The mysterious wonder of an underground waterfall is illuminated by multicolored lights.

One of the oldest medical collections in Europe focusing on rare surgical instruments.

The ghost town left by the worst nuclear disaster of all time is being taken over by nature and urban explorers.

Human remains in varying states of decay are strewn about this Texas State facility for scientific study.

House of vintage taxidermy and Steampunk sculptures in a quiet Pittsburgh neighborhood.

The astonishing collection of an infamous criminologist.

An astounding collection of medical specimens, including bits of President Lincoln.