Filled with goldfish swimming in a shallow pool of sea water, this ancient crypt is more wishing well than burial site.

This 6th-century church has the largest and best-preserved collection of Byzantine mosaics outside Constantinople.

Italian poet Dante Alighieri is entombed in this small mausoleum in Ravenna, and his hometown of Florence has never been too happy about it.

An incredible mosaic-lined monument said to have held the remains of an ancient Roman empress.

A medieval, mosaic-lined baptistry built by a heretical Christian sect.

The roof of this ancient mausoleum is made from a single Istrian stone weighing a massive 230 tons.

This 18th-century former mosque held the first Hellenic Parliament.

This painted Lego bridge is the product of over a century of locomotive history.

Legions of Roman soldiers bathed in this ancient spa complex under a Budapest transit station.

When a supermarket opened up shop within a medieval building it became protected by UNESCO on a technicality.

The Greek War of Independence was declared at this medieval Byzantine sanctuary.

The ruins of an abandoned medieval city where the last Byzantine emperor was crowned.

The mosaic floor of a 4th-century synagogue features a pagan zodiac wheel alongside traditional images of a Torah ark and menorahs.

A magical oasis in the middle of the Negev Desert.

An ancient underground cultic temple where sunlight penetrates on the summer solstice.

You can row a boat through this ancient underground reservoir.

A stunning mosque owes its design to an Ottoman ruler nicknamed "the Butcher."

This synagogue is covered in beautiful mosaics that explore the history of the Jewish people.

The bluer than blue waters in these natural Israeli caves are reached via the world's steepest cable car.

The once forbidden "secret cabinet" of erotic art from excavations of Pompeii and Herculaneum.

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

A fountain standing as a testament to a doomed alliance.

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.