Disused seaplane hangar gets a second life as the jaw-dropping home of Estonia's museum of maritime history.

3,000 market stands in five former Zeppelin hangars.

The oldest housing complex in Riga is a mini timeline of architectural trends.

Flamboyant architecture from the turn of 20th century.

The Jardin d'Étretat is populated by over-sized raindrop sculptures that make funny faces at visitors.

In 1927, a biplane disappeared while attempting to complete the first non-stop transatlantic flight between Paris and New York City. This memorial stands at the last place it was seen.

An effigy of a trapped paratrooper dangles from a Normandy church to commemorate one remarkable D-Day event.

A scandalous Art Nouveau collaboration that set Paris all atwitter at the turn of the 20th century.

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

Cemetery honors Americans who died during WWII and is the resting place of Gen. George S. Patton.

The official motto of Luxembourg reminds passersby of the Luxembourgish commitment to their national identity and sovereignty.

An expansive complex of subterranean tunnels is all that remains of one of Europe's most formidable medieval fortresses.

A collection of old neon signs from all over Poland line a secluded courtyard.

Inside this Krakow church, an explosion of psychedelic color.

St. Mary's features one of the most spectacularly decorated cathedral interiors in all of Europe.

An underground city of salt.

Countless stories attempt to explain Poland's mysterious J-shaped trees.

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

This artistic fountain display pays homage to this area's theatrical history.

If James Bond bungee-jumped off the side of a 720-foot dam, would you do it too?

This medieval footbridge in the Swiss Alps is known to attract cliff-jumping daredevils.

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

This memorial commemorating fallen Swiss Guards of the French Revolution has been called the saddest stone in the world.

This 170-year-old Swiss guesthouse built into the side of a mountain is best accessed by a cable car.