The Old Courthouse takes visitors on a captivating trip through St. Louis' timeline.

A floating museum that was sunk by a flood and left to rot in the tides.

What was once a presidential estate is now an exotic menagerie and home to the Budweiser Clydesdales.

400 million-year old limestone caverns nestled in the Ozarks served as shelter and a hideout for cultures throughout North American history.

The only Bahá'í house of worship in North America and one of only a handful worldwide.

Originally envisioned by King Ludwig II to rival Versailles, Herrenchiemsee's "New Palace" remains half-gilded for lack of funds.

Daily jousts and dancing barrel makers in Munich's mechanical clock.

A serious museum dedicated to two German comedians.

This German version of Universal Studios holds a vault of treasures from the NeverEnding Story.

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

France's most famous cemetery, with some of its most curious tombs.

This bridge was constructed from the rubble of the infamous Bastille.

This Dresden church was purposely rebuilt Protestant after being demolished in World War II.

Cold war icon and onetime "hole" in the iron curtain.

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.

Hamburg's first legal sex work is relegated to a gated street that still does not allow pedestrian women.

Hitler's bleak vision of relaxation still stands as a mostly abandoned 10,000-room resort complex.

A steam powered train that runs on city streets.

The last bastion of Roman presence north of the Alps looms over a German town.

Legendary site where an evil bishop was devoured by rodents.

The world's only silo that was topped by two revolving restaurants has unfortunately been demolished.

World's only telecommunication tower with a wooden pinnacle.

Amöneburg is a town perched on top of a basalt mountain in the middle of an ancient meteor crater.