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

A building that was once a general store, a speakeasy, and a newspaper office now holds a small gallery filled with New Orleans photography.

Once the site of a Native American harvest festival, this humble clearing later played an invaluable role in the birth of jazz.

A private museum dedicated to preserving the heritage of Mardi Gras' most beloved underdog parades, open by appointment.

A 98-room castle in the middle of Toronto that bankrupted a 19th century electricity multimillionaire.

A botanically themed auditorium blooms within the world’s last operating double-decker theater.

Berlin's old airport.

From toys to kettles to scientific instruments, this German museum celebrates the beauty of 20th century design.

Started as a kitchen garden, now the second largest botanical garden in the world.

It's always summer at the beach inside this former airship hangar.

No need to strap in for a "ride" on this walkable roller coaster.

Daily jousts and dancing barrel makers in Munich's mechanical clock.

"The most colorful grottoes of the world.

A whimsical and twisted animatronic monster tour beneath the streets of Berlin.

An eerie, derelict amusement park in Berlin.

The alley connecting two of country music’s most historic venues has a rich history of its own.

The bad-ass ride of a soul legend, housed in one of the world's few soul museums.

Labor provided by Great Depression-era programs restored these 25,000 acres in Tennessee.

An out-of-the-way wildlife haven with a rich and storied past of harboring thousands of fugitive slaves, or "Maroons" during the mid 1800s.

It's just another skyscraper, but it's shaped like '90s cell phone.

A beautiful deserted greenhouse in the middle of a park.

This sculpture meant to honor the bravery of the Indigenous Mapuche people of Chile proved controversial.

Pablo Neruda's custom-built lover's nest was made to remind him of the sea and named after his mistress' hair.

The upstairs museum delves into the Lawson family murder, whose eight victims were embalmed at this store in 1929.