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

This amazingly well-preserved villa just outside Pompeii boasts rare examples of ancient Roman paintings.

The walls and streets of the ancient city are peppered with penises.

Erotic art covers the walls of the largest ancient pleasure palace.

Ancient snack bar of the Roman Empire re-opened.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

J.R.R Tolkien, C.S. Lewis, and other "Inklings" met at the Oxford pub to discuss the now legendary fantasy stories they were writing.

Ancient Egyptian wigs, South American feather headdresses, a bounty of anthropological artifacts in Oxford.

Used as an example in one of the first dictionary entries for "museum" in 1706.

The works of poetry's biggest names grace the walls of the city of Leiden, all carefully painted by hand.

This 11th-century structure is one of the oldest churches in Romania.

Once the legendary capital of the Dacian Kingdom, this city has been reduced to mere ruins.

Nine centuries-old fortresses guard the walls of this medieval Romanian city.

The large fjord lake is thought to be the home of "Ogopogo," a giant sea serpent.

This country market harbors goats on its roof.

Yale University's home for rare works, including the mysterious Voynich Manuscript.

An ancient Egyptian temple sits within a modern European museum.

A 'living museum' in Leiden, the oldest of its kind in the Netherlands.

This remarkable prehistoric town is full of watchtowers and houses that have withstood thousands of years.

The tradition of open-air secondhand and antiquarian bookselling in Paris dates back to the Renaissance.

This structure atop a craggy cliff in one of the most beautiful parks in Paris boasts an unbeatable view.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

As if T-rex wasn't big enough, this Canadian monument is four times larger than the real thing.

Hoodoos, naturally eroded land formations, stand 20 feet tall in the Canadian badlands.