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

Of course Salvador Dalí lived in a castle...

An isolated village literally built into the crevices and rock formations of a mountain.

Village situated on a narrow volcanic escarpment.

Religious dwelling in a Spanish volcano.

Long tunnels run under the ancient chariot racing circuit to the tower.

Stunning Roman aqueduct used for 1900 years and still standing.

A Romanesque tower appears when water levels drop.

This ancient Spanish castle sits high upon a hilltop.

Replica of Seville, Spains famous Giralda, a former minaret converted into a bell tower.

Living towers made of people that are now recognized by UNESCO.

An enchanting monastery in the Spanish countryside appears lifted from a fantasy tale.

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

This whimsical winery by Antoni Gaudí looks ripped from the pages of a fairytale.

A gravity-defying "devil's bridge" that has a surprising architectural feature for its stability.

A science fiction-inspired apartment building designed by a famous Spanish architect.

This semi-secret storybook hedge maze is also the oldest garden in the city.

Mountain where Jesus was first tempted by the Devil.

A once grand hotel now sits eerily abandoned in the Catalan countryside outside Barcelona.

A beautiful but toxic fountain of mercury.

A vista of the city and sea from atop the little-known viewing deck on an unassuming Columbus statue.

A former steam-powered mill from the 1800s is now an industrial park with a giant steel dragon slide.

This former Baroque palace on the historic Calle Montcada is a rare architectural gem and was once the meeting place of an aristocratic scholarly society.

Possibly the oldest church in Barcelona, this basilica has its pagan and Christian mythologies all mixed up.