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.

A lush indoor jungle fills this bustling Madrid transportation hub.

A trough of 700 strange bronze faces runs through a narrow alley in Ljubljana's old town.

A celebration of all things tacky, garish, and bizarrely creative in the Romanian capital.

This sprawling concrete suburb of Kraków was designed by the Soviet Union as the model proletarian city.

The largest wine cellar in the world is a 150-mile network of underground caves near the capital of Moldova.

Museum dedicated to the terror regimes of Hungary.

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

The walls of Germany's Parliament still show the scars of the Red Army takeover in World War II.

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

A slice of central Asia in the middle of Berlin.

Underground monastery and fortress.

One man's personal collection of KGB memorabilia is presented along with his strange viewpoint.

A steampunk-styled three-floor factory churning out art, activism, and electronic beats.

This military tunnel dates back to World War II and provides visitors with a little wartime adrenaline.

An eclectic art form practiced by untrained masters is celebrated at this museum in the heart of Zagreb's old Upper Town.

When a supermarket opened up shop within a medieval building it became protected by UNESCO on a technicality.

The complex has been abandoned since the Croatian War of Independence, barring a stint as a set for 'Game of Thrones.'

This stunning, out-of-the-way Croatian monument commemorates a community's uprising against occupying fascist forces.

Eastern Bloc nostalgia, anybody?

A collection of art from Bulgaria's time as a communist state.

This top-secret nuclear bunker hidden in a Bosnian mountain has been converted to a modern art exhibition space.

A Buddhist shrine in a cave protected by macaques next to dark passages lined with creepy paintings.

Six times a day a train runs right through the middle of this Thai street market, sending vendors scrambling.