A historic observatory precariously perched at the "Top of Europe."

The final resting place of the great navigator, or maybe his brother.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

This tiny lake temple dedicated to a water goddess seems to float on the surface.

This sacred cave temple is home to thousands of bats and according to legend, a giant snake king.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

World's largest porcine hairball sits in a collection maintained by Benedictine monks.

It houses the remains of a 17th-century version of the Titanic.

Hindu temple of the dead home to hundreds of long-tailed macaques.

Synagogue built from the stones of Solomon's temple contains the golem of Prague.

Disney World's very first waterpark is now an abandoned ruin being reclaimed by the swamp.

The stones of this Incan wall complex fit together so well you couldn't fit a piece of paper between some of them.

A floating cat sanctuary on an Amsterdam canal.

A wonderful collection of all things Oz is nestled in the heart of Kansas.

This extravagant Art Nouveau rest stop features a million-dollar view of the Columbia River.

Bridges, terraces, and replicas of historic structures all built of rock and petrified wood by one man.

A dismembered holy head stares out from her beautiful reliquary at the St. Dominic Basilica.

Few other hotels can rival the grandeur of the Castle in the Rockies.

This historic covered bridge contains a series of macabre paintings that communicate one thing: everyone dies.

Home of Jake the Alligator Man, the mummified remains of a cigar smoking, cross-dressing celebrity of the Northwestern coast.

Breathtaking and huge 430 year old maps of Italy.

Home to the only outdoor municipal elevator in the United States.

Morocco's Argania trees are infested with nut-hungry goats.

This medieval castle overlooking the Elzbach river looks just like it did hundreds of years ago.