Part modern art project, part traditional chapel, this see-through church is only substantial from the right angle.

Terrifying derelict military hospital once housed a recuperating Hitler.

This French ghost town from World War II has been left as a memorial to German atrocities during World War II.

Ruined 11th century abbey built by King David I in Edinburgh, Scotland.

A beautiful but toxic fountain of mercury.

The magic's in the hole!

Peek through a transparent pyramid and drink in the mountain made of books.

A fantastic castle rumored to be the birthplace of King Arthur.

A beautiful geyser under environmental threat.

Abandoned railway line circling the city of Paris.

The deepest lake in the United States, and once the site of epic destruction that lives on in legends.

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

Shop selling 500 flavors of soda has something for everyone.

Home to the infamous "Typhoid Mary" and the worst loss of life in New York's history prior to September 11, 2001.

Museum preserving torture methods from the past.

This shop and gallery is a modern-day cabinet of curiosities, unassumingly positioned along an urban thoroughfare.

Surreal riveted sea forts once protected the Kent shores from German attack.

A curious collection dedicated to human and animal anatomy and pathology.

The gloomy ruins that inspired Bram Stoker to bring Dracula to life.

Famously misunderstood wonder of the ancient world

Once the most densely populated place in the world, this island is now a ghost town.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

Northern Ireland's Brobdingnagian stepping stones.