This odd Chilean waterfall-cano hotel must be entered via a rope bridge.

This haunting stone chasm is a hotbed of mossy rock and English legend.

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

An Aztec snake god has taken the material form of an apartment complex.

The fairy tale castle of the "fairy-tale king."

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

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

Two stunning 17th-century libraries and a cabinet of curiosities.

The beautiful baroque library of the Hapsburg empire.

An ancient monastery, a locked room, and a mysterious book heist.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

A 19th century artistocrat's mansion, turned into a library, hidden in a modern library.

Dating back almost 400 years, the oldest public collection library in the United Kingdom was once the study hall of Karl Marx.

This picturesque mansion has gone from opulent ruin to nature museum.

A busy cafe better known for board games than food.

An incarceration museum on the spot of possibly the oldest prison in England.

Invisible bridge parts the waters, invoking biblical images and preserving the ominous feel of an ancient moat.

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

A swing to dangle you off the very edge.

Climb inside an iron crystal magnified 165 billion times its normal size.

An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.

Historic psychiatric asylum and most-filmed location in the Great White North.

A beautiful final resting place for some of the noteworthy deceased.

This series of Scottish caves has no clear purpose other than baffling historians.