Originally a leper colony, the island is now an Armenian monastery that's home to an incredible manuscript library and eclectic museum.

This medieval city gate is now a blend of the past and the modern world.

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.

Among the busts of heroes of the Roman Republic of 1849, there is also a statue of a boy and his dog.

The charred, dead skeleton of an oak tree is said to have consoled a dying 16th-century Italian poet.

This unassuming bridge is most likely one of Michelangelo's unfinished masterworks.

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

A detailed pachyderm supports Rome's smallest Egyptian obelisk.

A huge enchanting public park just outside the ancient walls of Rome.

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

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

St. Francesca Romana, patron saint of drivers, resides in the church she founded.

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

Carnivorous plants, medieval aphrodisiacs, and the largest original wood structure glass conservatory in the western hemisphere.

Relics of the 1894 Midwinter Exposition continue to delight visitors today.

A Pythagorean funhouse that tries, successfully, to prove that math is the coolest thing ever.

This monument to a veteran of the Mexican-American War is one of only two in Manhattan that serve as an actual mausoleum.

A Manhattan courthouse hides a small but scathing memorial to Holocaust injustice.

Each solstice, students and astronomy enthusiasts gather at a primitive but functioning sun wheel to witness how humanity first used this calendar.

A 26-foot-tall fiberglass American legend stands proudly here.

This rustic old building is said to be the most photographed barn in America.

One of the largest collections of wildlife art in the United States, built into the side of a cliff in rural Wyoming.