The sound of swaying stalks in this stunning grove has been named a governmentally recognized sound.

Five candy-colored villages on the Italian Riviera.

The doodles of a genius line the walls of a secret room under the Medici Chapel, where they were hidden for nearly 500 years.

An Italian hillside ghost town.

A rare, flower-shaped example of Brutalist architecture in Switzerland.

A tiny theater hidden in an alley plays a constant stream of short silent films for anyone willing to peer through the peephole.

A small museum filled with over 1,000 clocks, and one particular clock calibrated to run until the year 9999.

Keshwa chaca, among the last handwoven Incan bridges, crosses Apurimac Canyon in Peru.

An ethereal glowing blue ocean cave in Croatia.

The abandoned husk of a mental institution that failed to save a Jazz Age icon still sits nearly unchanged.

Iceland's largest lagoon is home to stunning multi-colored icebergs.

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

Tubing through a cave lit with glowworms is a magical underground experience.

This lab's maddening silence is good for business but bad for sanity.

A slice of central Asia in the middle of Berlin.

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

A 30-acre garden inspired by the principles of modern physics.

This strange seaside tower got its name from a wealthy eccentric who would hide coins among its stones.

A swing to dangle you off the very edge.

This massive library holds what was once the largest book collection in the world.

A fiery crater has been burning in the Karakum Desert since 1971.

This lower Manhattan bar is set up in an old bank vault that rests beneath a skyscraper that hides even more historic splendor.

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

A tour of underground Berlin takes you through WWII air raid shelters and tunnels used to smuggle people out of East Germany.