Vienna's underworld of tunnels and subterranean rivers made an iconic appearance in a 1949 Orson Welles film.

This Austrian museum celebrates the work of famous forgers and their inimitable imitations.

The beautiful baroque library of the Hapsburg empire.

A tropical paradise just a short trip from the opera house is filled with beautiful winged creatures.

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

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

Art and a pun, all in one.

A slice of central Asia in the middle of Berlin.

This futuristic German spa allows visitors to float in a pool of salt water while zoning out to underwater techno.

A Milanese café entirely designed by the American director Wes Anderson.

A Catholicism-themed restaurant where sacrilege is on the menu.

A restaurant modeled after feudal Japan, where the waitstaff are trained as ninjas.

Drinkslinger is an unlikely vocation for a Buddhist monk, but at this Tokyo bar the enlightenment is served in a martini glass.

Not quite the menace it once was, this monster still has some chops.

A 20-meter (65-foot) robot towers over Tokyo Bay.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

Go inside to really appreciate this 500-year-old technological masterpiece.

This Venice bookstore has resigned itself to constant flooding by keeping its books in bathtubs and boats.

This community on a small Venetian island has taken to painting their houses in bright neon hues.

One of the world’s smallest bars, just 13 square feet, is brimming with speakeasy flair.

Two very green residential towers cleaning the air in one of Europe's most polluted cities.

Long-abandoned art nouveau baths beneath Milan's Piazza Oberdan.

A restaurant on Staten Island showcases a different grandmother’s cooking every night.

This century-old cinema house has a marquee that has been hand painted by a single man for over 25 years.