The first museum in the world devoted to sexual gadgetry.

A celebration of capitalism in Midtown.

This unmarked and unloved Manhattan subway grate created one of the most iconic images in American cinema.

Michael Jackson got Bad and Crocodile Dundee walked on heads in this iconic Brooklyn subway station.

Roman ruins top white travertine terraces formed by ancient hot springs.

Rebuilt remains of a temple to Roman god Mithras.

The underground sanctuary of a mysterious ancient cult.

Rome's semi-secret peephole vista is also a former Crusader stronghold.

The only "Egyptian" pyramid in Europe and the legendary tomb of Remus.

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

At the crypt of St. Mary of Eulogies and the Dead you are left alone to ponder mortality among piles of skulls.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

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

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

This skewed English house has looked like it's going to fall over for centuries.