Barcelona's only remaining tram system takes riders to the Tibidabo funicular.

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.

Week-long block party becomes a competition for the best decorated street.

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

The oldest giants in Catalonia are now displayed in a 14th-century Gothic church.

This stunning iron gate designed by Modernist architect Antoni Gaudí is filled with mythic symbolism.

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

This cemetery features modernist statues as strange as its name.

Fall down the rabbit hole into a surreal journey of human consciousness "from ass to soul."

This museum is home to a sugar sculpture of the Berlin Airlift Memorial.

A restaurant and observation deck built in a unique broadcasting antenna.

The bunker where Hitler took his own life is hidden under this deliberately ordinary parking lot.

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

This colorful but controversial ceiling has been likened to a 21st-century Sistine Chapel.