A detailed pachyderm supports Rome's smallest Egyptian obelisk.

A master of trompe-l'oeil creates a stunning, tourist-fooling dome out of a flat ceiling.

A deep mark on the remains of a Roman temple, believed to be left by a legendary warrior.

An 18th-century post box used to alert the church of sick and ailing foreign pilgrims.

A large replica of a monumental Roman inscription is located on the side of this museum.

Architectural monsters are devouring this palace's every door and window.

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

This hydrochronometer was invented by a Dominican monk and is a prime feature in this garden.

Romans decided this 16th-century "talking statue" was so ugly, they named it after a primate.