Europe's second largest ossuary wasn't discovered until 2001.

Synagogue built from the stones of Solomon's temple contains the golem of Prague.

Despite attempts by local police to discourage it, Beatles-inspired graffiti has been a means for artists to air grievances for decades.

Mummified monks and the accidentally interred, in a 17th-century crypt.

Museum dedicated to the terror regimes of Hungary.

Increasingly decayed figures stand as a powerful reminder of the human costs of Czech Communism.

A church of bones, decorated with 40,000 human skeletons.

Macabre astrological automaton clock dating to the late 1400s.

An 18th-century Spanish watchtower made entirely of seashell and concrete.

Meet manatees face-to-face at this zoo for native species.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

The Old Courthouse takes visitors on a captivating trip through St. Louis' timeline.

Once one of the world's great cities, Cahokia was a place of religious worship, trade and mass human sacrifice before being mysteriously abandoned.

The granddaddy of all tourist traps, built on ice water, jackalopes, and a giant dinosaur.

A fitting attraction for the corn capital of the world.

One of America's first dinosaur parks gives a window into Depression-era paleontology.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

Largest tulip festival in America, includes fireworks, a parade, and a carnival.

Week-long festival in the baby food capital of the world.

With over 5,000 champions, the Hall of Fame continues to draw amateur eaters.

A 70,000-square-foot institution dedicated to a very literal, creationist perspective on the Book of Genesis.

A rapidly disappearing authentic bit of the old south.

Settled in 1696, abandoned after the Revolutionary War.

Oldest unrestored plantation house in America that is open to the public.