The skulls and bones of thousands of soldiers line the walls of this small Italian chapel.

Explore this medieval cathedral by trying to spot all the malevolent monsters hiding in its beautifully colored windows.

There has been an astronomical clock on this spot since the 14th century.

The castle was reconstructed to fit Kaiser Wilhelm II's romanticized vision of the Middle Ages.

This unusual piece of Renaissance art depicting the bodily horror of crucifixion and skin disease may have been inspired by fungus-induced hallucinations.