A magnificent, long-abandoned castle built in the wake of the reconquest of Spain.

A whimsical brother of the nearby Fallen Angel statue takes the falling part quite literally.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

A must for film lovers in Madrid and home to the Spanish Film Library's projection space.

Over two centuries old and counting, Madrid's massive botanical garden contains one of Europe's only desert environments.

A lush indoor jungle fills this bustling Madrid transportation hub.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.

Legend says these colorful, invasive residents are the descendants of birds released by Jimi Hendrix.

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

This bridge was constructed from the rubble of the infamous Bastille.

A beautiful Victorian statue shows France's enduring love of the rhinoceros.

This emotive sculpture was originally created for the 1878 World's Fair.

The tradition of open-air secondhand and antiquarian bookselling in Paris dates back to the Renaissance.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

Known as the "Dodo Manège," this carousel features a herd of animals that have disappeared—or may be gone soon.

The water-powered carriages are long gone, but for over a century this funicular railway has been the fastest route to the highest point in Paris.

A Dutch passageway's artistic, aquatic-themed makeover pays tribute to the capital city's famed waterways.

Three connected pink triangles memorialize persecuted gays and lesbians throughout history.

An ancient passage filled with stalls selling used books, once frequented by Vincent Van Gogh.

This gorgeous reading room houses the oldest and largest art history library in the Netherlands.

Old ships and machinery fill a historic harbor in the city that's home to Europe's largest port.

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