A 16th-century Andalusian palace.

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

Holy Grotto of Montserrat Monastery holds one of Europe's mysterious black Madonnas.

A rare set of strings by famed instrument maker Antonio Stradivarius is on display in the Royal Palace.

This macabre masterpiece of a mural is one of Francisco Goya's "Black Paintings."

A display of torture devices used in the Spanish Inquisition and other scourges of medieval Europe.

This irregularly shaped sea fortress has defended not one but three different sovereign states.

An abstract monument to a symphonic composer.

A subterranean house of worship carved right out of the bedrock.

A little sculpture with a large wardrobe.

Three floors of musical instruments coming from all corners of the world and hundreds of years of musical history.

A beer pipeline runs beneath Bruges.

This fairytale castle was built as a show of power but was nearly torn down thanks to its history of torture.

These slanted cubic abodes are a creative if odd solution to a zoning pickle.

Rotterdammers' dirty minds gave this Santa a dirty nickname and cursed it to a life of wandering.

Birthplace of the "Cat in the Cradle" and a cluster of iconic, original windmills that let the Dutch tame the seas.

Take a stroll through the hellish grotesques of Hieronymus Bosch in this elaborate Netherlands church.

This Netherlands museum holds a gloriously mechanical collection of ornate musical automata.

The largest treasure hoard in Europe is contained in a castle that was bombed out during World War II.

When the rain falls, this drain system turns into a musical instrument.

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

In addition to fine dairy products, the world's most beautiful milk shop also offers a feast for the eyes.

Naturally formed rock city in Poland.

This Polish cave has housed a dragon, a brothel, and an enduring legend.