Peeing dogs guard the Roman hunting goddess atop a fountain at France’s Château de Fontainebleau.

The ancient mosaics here are considered among the finest in the world, and serve as a stunning record of Greco-Roman daily life.

The only quarter of the Old City not dedicated to a major world religion.

An ancient tunnel in Jerusalem built to redirect water in the event of a siege is one of history’s great architectural innovations.

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

A sprawling ancient Jewish cemetery with over 30 rock-hewn burial caves.

Built in the 1300s, this magnificent building that hosted England's kings and queens transports you to the Middle Ages.

All that remains of the only English cathedral destroyed in the Protestant Reformation.

One of these two land speed record-breaking vehicles went so fast it shattered the sound barrier.

The bombed out remains of the old church were kept intact next to the new one, as a reminder of the futility of war.

A preserved block of timber buildings from the city's industrial era in the Middle Ages.

Every hour on the hour a naked heroine and her leering foil appear from this giant cuckoo clock.

Preserved baths in a Victorian-era spa town frequented by the most famous people of its day.

The maze-like transportation hub contains abandoned areas, derelict stores, and a resident bat colony.

The platform atop this verdant volcano was built with the help of a royal elephant.

Eighty million natural history specimens call this gargantuan museum home.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

A horde of stray cats rule in this secluded Parisian cemetery under a bridge.

This historic "City of the Dead" lies prominently in the center of New Orleans' famous Garden District.

A derelict bit of infrastructure from the canal that once ran through D.C. is landlocked in the heart of the city.

The little-known, 300-year history of the area includes former lives as a bustling tobacco port, parking lot, and industrial dump.

High winds can make this one scary landing.

A petite castle folly in the English countryside.

This historic abandoned train station looks like a stop for ghost trains.