The largest toy museum in Poland showcases Europe's history of childhood.

Disturbing works of outsider art, carved from whole logs.

The walls and ceiling of this Polish church are decorated with thousands of skulls, with another 21,000 skeletons just below.

The silly symbol for an underground protest group is now scattered around the city.

The biggest exposition of dental equipement in Europe. And a Mummy.

One of the largest amphitheaters in Europe is a former Nazi gathering place that still stands today.

The soulless eyes of 82 bronze children stare on forever in remembrance of a horrifying World War II massacre.

The headquarters of the Fraternitas Rosae Crucis, complete with Rosicrucian pyramids, all in the Pennsylvania woods.

The Home and murder site of the witch of Rehmeyers Hollow.

The tragic reality of a town riddled with rumors of haunts, chemical spills, and serial killers.

An abandoned castle owned and ignored by Masons carries a cursed history.

Site of a former hidden treehouse in New Orleans.

Despite the ever pressing encroachment of urban sprawl this grand New Orleans manse still stands.

New Orleans' famous cemetery, located on the site of a former race track.

A snapshot of the city's fascinating voodoo culture.

One of the longest water bridges in the world was built over a supposedly haunted swamp in Louisiana.

World's largest precision optical instrument used to detect Einstein's elusive gravity waves.

Continuing the tradition of the dime museum in style.

Taxidermy, Cigar Store Indians, A Model of a New York Tenement and Delicious Draft Root Beer.

An encyclopedic collection of mammal penises.

Medical museum that houses most notably the taxidermied remains of Vladimir Demikhov's famous two-headed dog experiment.

The last of Philadelphia's wood-paved streets is now a landmark of terrible engineering.

The first American department store, and home to the largest operating musical instrument in the world.

Huge masonic hall in Philadelphia with lavishly themed rooms.