Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

The first museum in the world devoted to sexual gadgetry.

This tipsy office building in downtown Prague was originally called “Fred and Ginger.”

The slender brass strip in Prague's Old Town Square was used to tell time from 1652 to 1918.

Macabre astrological automaton clock dating to the late 1400s.

This spooky statue sits outside a famous Prague theater.

A bust of Franz Kafka spins in pieces, reflecting the writer's inner torment.

A tiny town’s tiny museum with some gigantic residents.

Marking the spot where a conquistador gave up his search for the fabled Seven Cities of Gold.

This mid-19th-century dugout was once home to a Swedish family as they erected their homestead.

This historic early-20th-century building still boasts some of its original features.

This century-old painting of a portly 10-foot-tall man spent years hidden behind plaster.

A unique blue and yellow phone booth in America's "Little Sweden."

The oldest house in Lindsborg, Kansas, includes some fascinating inscriptions.

Sid Vicious famously punched a hole in the wall of this iconic music venue.

An acoustic anomaly with a mysterious cause.

A half-size replica of the World Trade Center towers above Tulsa.

Songwriter Leon Russell transformed this church into a recording studio used by many legendary musicians.

A museum packed with instruments, lyrics, and other mementos of the American folk icon.

The fifth tallest statue in the United States is a shirtless monument to the oil worker.

Standing at 21-feet tall, this space cowboy adds to the legacy of Route 66's muffler men.

One of the best examples of Art Deco architecture in the United States.

Inside this shop, visitors are treated to a unique blend of natural history and art.

A mud statue stands in the dark tunnels, seeming to hold up the weight of the city above.