This small town in the Netherlands has no roads but instead, miles of canals and over 100 bridges.

This disused VLF radio station is no longer in service but the surrounding town still bears its name.

The birthplace of most all of Europe's space missions is here on the Dutch coast.

This miniature take on the Kremlin is one Dutch man's retirement project.

From Coke II to Google Glass, this exhibit features some of the most spectacular commercial flops.

A Christian retreat founded to welcome refugees fleeing from the Nazis during World War II.

The library's graceful rotunda is like a bibliophile's temple.

Thanks to an acoustic anomaly, this unassuming stone bench has heard one hundred years of secrets.

These blingy, baubled skeletons lie in glass boxes inside a baroque Bavarian church.

Handsomely crafted representations of our round planet.

Giant WWII fortresses that fired 8,000 rounds a minute, now home to thousands of pigeons.

This jaw-dropping 19th-century bridge uses its reflection to form what appears to be a perfect circle.

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

This whimsical castle of grottoes was the labor of love of a French postman, and one of the greatest achievements of outsider architecture.

A German apartment building hosting as many trees as human occupants.

A rare water-powered funicular, it uses a huge tank of water and gravity to do its work.

Underneath the city that invented pilsners are a series of historic tunnels that have been storing beer for centuries.

This "mathematical tower" was an observatory, early skyscraper, and place to reflect on all of nature and the cosmos.

Located right outside of Vienna, visitors can take in expansive views of an ethereal forest.

A tropical paradise just a short trip from the opera house is filled with beautiful winged creatures.

The house that took a plunge into the facade of a museum.

This series of underground chambers contains Europe's largest subterranean lake that is slowly drained each day.

The birthplace of Karl Marx is now a museum dedicated to the communist revolutionary's life and work.