Spanning the El Chorro gorge, this pathway used to be one of the most dangerous crossings in the world.

This quaint Spanish village agreed to be painted blue as a marketing stunt but found that they preferred it that way.

One of the most spectacular bridges in Spain spans a narrow chasm that divides the city of Ronda.

Three bridges and one giant canyon make up this fantastic Spanish settlement.

Rare karst landscape eroded from a flat seabed.

A hidden medieval crypt where a famous legend says the devil used to teach black magic.

The Cathedral of Salamanca has a number of unusual carvings but none so surprising as a modern astronaut.

Hundreds of stone stairs and a winding medieval bridge connect this haunting Spanish island to the mainland.

The only remaining U-boat that is still floating never actually saw any action in World War II.

Once the longest swing bridge in Europe.

Constructed by forced laborers, this submarine pen is now a museum and war memorial.

Böttcherstraße's bells, extolling Nordic virtues and the great conquerors of the world.

A stunning gilt bronze relief denounced by Hitler as "degenerate art"—even though it was dedicated to the Nazi leader.

One of the oldest wine cellars in Germany is now a restaurant beneath Bremen's town hall.

A spitting ode to a German serial killer.

This ancient Roman bridge and aqueduct still stands as a wonder of classical construction.

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

For over 300 years this little carving has been the city’s good luck charm.

Wall after wall of this French seaside neighborhood is intricately decorated with seashells and corals.

This submersible road connecting a French island to the mainland is lined with safety towers for when the tide strands travelers.

This French ghost town from World War II has been left as a memorial to German atrocities during World War II.

Historic medieval fortified city in southwest France.

Giant eggs, walls of bread, and nightmare surreality mark the largest collection of works by Salvador Dalí.

A whimsical garden of outsider art in the Spanish countryside.