2300-year-old Roman road connecting the empire.

The engineering wonder and pleasure dome of a much-maligned emperor still holds undiscovered secrets.

The yawning maw of this pagan visage is said to bite off the hands of liars.

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

Just across from the "Last Supper" painting is the famous painter's vineyard, a gift received for creating the masterpiece.

A slightly creepy gallery of plaster cast models in the same museum as Michelangelo's David.

Secret refuge and museum of the Duke of Florence.

Charnel house at the foot of Mount Sinai.

These Egyptian statues have survived for 3,400 years and were an acoustic wonder of the ancient world.

Ozymandias’ time-keeping temple.

A diminutive statue that was inspired by the sculptor's own daughter.

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

Some of the greatest minds in the history of Hungarian art and science converged in this café.

Budapest's Communist-era statues, banished to the suburbs.

The abandoned "Red Star Train Graveyard" is the final rusting place for precious artifacts of train history.

A Trabant car, a kangaroo statue, and a plethora of plants take over this abandoned-factory-turned-bar.

This off-beat, quirky communism-themed bar isn't afraid to poke fun at its history.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

A series of caves under Castle Hill that once held the prisoner Vlad Tepes, better known as Count Dracula.

The world's longest outdoor covered escalator system transports commuters through Hong Kong's hilly terrain.

Taoism, Buddhist and Confucianism are all represented in this temple that claims to answer anyone's wishes.

Climb to the top of the world's largest seated bronze Buddha.

Remnants of the most densely packed city in world history, that thrived on anarchy for 30 years.