The largest Art Nouveau complex in the world is a Barcelona hospital with a 600-year-long history.

Bask in the 19th century grandeur of an eccentric Freemason millionaire's private gardens.

Step inside the first house designed by Catalan architect Antoni Gaudí, considered to be one of the first Art Nouveau buildings.

Gaze upon chocolate sculptures depicting everything from chariot races to Gaudí's famous church at this shrine to sweets.

This cemetery features modernist statues as strange as its name.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

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

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 haunting contrast of trains that both saved and took the lives of Jewish children in Nazi Germany.

A statue of an astronomer gazes at the sky as a tribute to Caroline Herschel.

This public observatory is home to the "celestial cannon," the longest pointable telescope in the world.

Superb sweets await at the first Jewish bakery inducted into Berlin’s prestigious baker’s guild.

A dilapidated space station with overtones of 'Alien' and 'Bladerunner' featuring a multiplayer games galore.

For more than 170 years, this family-run bakery has been serving Berlin’s best Baumkuchen, or “tree cake.”

At one of Berlin’s oldest churches, visitors can place mosaic tiles to help restore a medieval mural.

Puppet theater and museum holding a collection of more than 300.

Berliners converted a bombed-out, disused lot into a community-run urban farm with its own cafe and bar.

Residents of Berlin take their coffee and cake in one of the city’s most restful spaces: a cemetery.

These brass bunnies honor the rabbits that dominated the no-man's-land around the Berlin Wall.

Berlin's old airport.

This Berlin island is home to a flock of free-roaming peacocks, as well as a historic ivory folly.

Gardens representing parts of Asia, Europe, and the Mid East are tucked away among the Soviet-style buildings in East Berlin.

Art and a pun, all in one.