The remains of this 2nd-century Roman temple are incorporated into a modern building.

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

A massive marble foot is tucked away in a small alley near the Pantheon.

A statue representing a lost Roman profession that was vandalized for centuries.

The spot where the fascist dictator made some of his most famous speeches including declaring war on Britain and France.

This statue is the only female representation of Rome's "talking statues."

An ancient Roman temple first dedicated to an emperor's wife is now a church.

An ancient Egyptian obelisk is now used to commemorate fallen Italian soldiers.

A sculpture serving as an homage to Pope John Paul II.

This coffee shop lies hidden beneath a historic church.

This stone once marked the boundaries of Liverpool's medieval markets.

This whimsical public art installation is a unique homage to Liverpool's industrial heritage.

An iconic Soviet statue of working-class people.

A medieval quay that was the Mayflower's final port of call before sailing for America.

This long-hidden space above Westminster Abbey now displays the battle gear of the legendary King Henry V.

The "beautiful" equation predicting the movement of all electromagnetic particles is engraved in front of Newton's tomb.

A mysterious carving from 17th-century London seemingly depicts a young boy sitting on a bread basket.

Thanks to both terrific preservation and historic vandalism this ancient site is known as the "Heart of Neolithic Orkney."

Possibly the oldest of Britain's ancient henges is also one of its most stark.

Amazing and mysterious Neolithic settlement on Scotland's Orkney Islands.

The true age of this ancient stone circle is unknown, but its stunning vista isn't in question.

The discovery of this Neolithic settlement, which contained a Stone Age "cathedral," threw archaeologists for a loop.

This tin chapel was built by POW's during World War II and is painted to look like something much more grand.

The sign marks one of the endpoints to mainland Britain's longest overland travel route.