This is not only one of the oldest collections in Europe, but also possibly the most beautiful.

It's not hard to see why the historic Peabody Conservatory of Music's library has been described as a "cathedral of books."

Stockholm's decidedly unique public transit system has doubled as the world's longest art gallery for decades.

Sweden's first nuclear reactor, R1, can be visited 25 meters underground.

An old hill fort covered in over 100,000 crosses is a symbol of Lithuanian nationalism and beliefs.

The second oldest continuously operating bar in Louisiana.

A private museum dedicated to preserving the heritage of Mardi Gras' most beloved underdog parades, open by appointment.

This hilltop warren of monastic dwellings is the result of centuries worth of Mongol attacks.

The highest monastery in the world operates a tiny guesthouse with doors open to all.

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

According to the local folklore, the myriad colors of this lake are the result of a lovelorn wizard's blunder.

A mega theme park-wax museum mélange containing all things biblical.

This small Estonian hill is covered in hand-made twig crosses that are said to bring good luck.

No matter what it might seem like on film, most scenes filmed on a plane are filmed at this LA studio.

The second tallest railway trestle bridge in America.

A Japanese corporation has turned this small island town into living modern art gallery.

Japanese island famous for poison gas and fluffy bunnies.

This high-design church is made up of two dizzying spirals meant to evoke the weaving together of marriage.

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

Mirrors and glass shards cover every inch of this arrestingly beautiful mosque.

This electric green sulphur lake in New Zealand looks like a cartoonish radioactive dump site.

A miniature rainforest is growing inside of a Midtown Manhattan office building.

An ancient Ethiopian cave church is endangered by the simple building of a road.

A trio of hidden hot tubs takes advantage of Iceland's natural geothermal vents.