Ancient serpentine sacrifice holder that has stood the test of time.

Legend says if you stick your thumb in the hole and it gets wet, your wish will be granted.

1513 Turkish world map, full of European state secrets and snarky commentary.

This remarkably well-preserved Egyptian plinth is pretty well traveled for a giant piece of stone.

The deepest underground city in Turkey was designed to protect 20,000 people behind massive stone doors.

Turkish adventurer antiques in the heart of the Grand Bazaar.

A small etching on the white marble parapet was written in runic script by a Viking mercenary.

Roman ruins top white travertine terraces formed by ancient hot springs.

A marvel of Byzantine engineering under the streets of Istanbul.

In this historic region, homes and churches are carved into ancient volcanic rock formations.

The home of the Dead Sea Scrolls is an abstract modernist dream.

This daunting 1st century fortress was purportedly the site of one of the most dramatic revolts of the Jewish-Roman wars.

Stunning ruins of what was once the center of one of the greatest empires in East Africa.

Rare signs of the former Soviet Union in the Caribbean, though not where you'd expect them.

Italy's third-largest Roman arena gives a peek into the underground operations beneath the ancient spectacles.

For centuries, this large Roman villa remained hidden thanks to the eruption that buried nearby Pompeii and Herculaneum.

Before it was buried by volcanic ash, this fast-food restaurant fed the hungry hordes of ancient Rome.

According to tradition this is the oldest church in Venice, but its actual age is a mystery.

In the past, Renaissance sex workers were encouraged to entice customers on this bridge.

Buried next to Pompeii, this lesser-known Roman villa was the opulent vacation home of Emperor Nero's wife.

This Roman statue is missing a limb from when the Venetians stole it from Constantinople during the Crusades.

This amazingly preserved Doric temple was abandoned before it was ever completed.

A copy of the famous statue can be found in this Florence piazza, along with one of the most breathtaking views of the city below.

This breathtaking monastery was established by Saint Benedict himself 1,500 years ago.