The ruins of the largest gladiatorial school in Rome are largely hidden under modern streets.

A Nesting Doll of Churches.

A rather vulgar example of the transition from Latin to the Italian vernacular.

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

A monumental fountain in Rome features a large statue of Moses that has been criticized for centuries.

Installed in an act of one-upsmanship, the annual sundial in this church is also a symbolic victory for the Gregorian calendar.

The martyr's wax-enhanced skeletal remains lie preserved in a glass case in the Santa Maria della Vittoria in Rome.

400-year-old garden, restored to beauty.

A giant white horse drawn on an English hillside may not have been intended to be a horse at all.

The plaques around this 19th-century structure recall some rather strange tales.

Legend says the people of Wiltshire got their "Moonraker" nickname from this small pond.

The first archaeological site discovered by aerial photography.

Famously misunderstood wonder of the ancient world

Huge winged monument in the United Kingdom.

Centuries of human activity have forged an eerie landscape of ruins and craters on an exposed and windswept hilltop.

This hilarious English intersection is an automotive whirlpool.

This iconic 1,000-year-old medieval castle is a favorite of the film industry, most notably as the location for Hogwarts in Harry Potter.

Twice a day this ancient path disappears with the tides, leaving the Holy Island of Lindisfarne out to sea.

Overlooked by many, the two famous Scottish warriors guard the main gate of Edinburgh Castle.