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

Baroque celebration of the end of the Great Plague of Vienna.

The final resting place for the remains of 143 Habsburg royalty.

Among the ostentatious rococo ornamentation of this church, an image of death cuts the life-thread.

Vienna's giant wonder wheel had a starring role in one of the greatest noir movies of all time.

This series of underground chambers contains Europe's largest subterranean lake that is slowly drained each day.

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

From Austrians to Nazis to Soviets, this historic Budapest fortress has a history as complex as the city itself.

Once the home of a hermetic monk, this cave now houses a small church.

One of the most enjoyable bits of history at Coney Island and “the most romantic ride in the world.”

A museum dedicated to exhibiting remarkable outsider art.

This small section of the Sleepy Hollow Cemetery is rotten with famous authors' graves.

The trials and tribulations of marking Poe’s grave.

The largest natural travertine bridge in the world is nestled in a small canyon in central Arizona.

A collection of full-size movie monsters opened to the public.

The taxidermied remains of Charles Dickens' pet raven, which helped inspire one of Edgar Allan Poe's most famous poems.

A morbid secret lies hidden within the beautiful walls of the Boston Athenaeum.

This nearly endless university hallway is home to a unique sunset known as "MIThenge."

This Boston medical museum features the skull of the famous medical case of Phineas Gage.

In 2010, Nicolas Cage purchased two plots in this cemetery using one to construct this strange pyramid mausoleum.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

Curious crustaceans support an obelisk from ancient Egypt that now stands in modern-day Central Park.

This tea house was a hand-built gift from Boulder's sister city in Tajikstan.

The Denver airport is guarded by a 32-foot-tall sculpture of a demonic horse.