The little church's beautifully frescoed ceiling has earned it the nickname “the Sistine Chapel of Madrid.”

Skeletons, medical artifacts, and other obscure and precious treasures all displayed in a wooden pharmacist's cabinet.

A simple plaque on the facade is the only reminder that the treaty ending the American Revolution was signed inside.

A majestic lion statue guards this Parisian botanical garden, and feeds on an unsettling item.

Indents in the pavement are all that remain from a grisly death machine in Paris.