Dodge prohibitionists and slide through the telephone booth in Crif Dogs.

A crumbling hospital from the 1850s on Roosevelt Island.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

This 1,400-year-old abbey was once a powerhouse for music and intellectualism known across Normandy.

The eclectic observatory castle of a 19th-century astronomer and explorer.

This church sits upon a peaceful hill and a long, turbulent history.

The mummified heart of Louis XVII, the lost dauphin of the French Revolution.

Underneath a chalk hill in France lies what Hitler hoped would be the underground launching base for a devastating new weapon.

The 16th-century church was kept in its ruined state as a reminder of the casualties of World War I.

The post-apocalyptic remnants of a bucolic town ruined by a plane crash.

This stunning French estate was so lavish that it landed its original owner in jail for the rest of his life.

These quaint French houses dangle precariously over a precipice.

This historic island prison holds one of the dungeons from the Count of Monte Cristo even though it is a work of fiction.

An icy lake tucked among jaw-dropping alpine panoramas.

Ancient paintings known as the "Sistine Chapel of Cave Art."

Sacked by Vikings, blessed by William the Conqueror, dealt a fatal blow during the French Revolution—these ruins have seen it all.

The oldest stone house in Paris was built by its most famous alchemist.

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

The spot where the fascist dictator made some of his most famous speeches including declaring war on Britain and France.

Cave shrine on Monte Pellegrino.

The Emperor Tiberius' palace of debauchery.

Built to repay the sins of the father, this church is home to one of the most valuable works of Western art.

The oldest of Venice's plague quarantine stations, designed to keep the medieval city safe from disease.

This entire town moved to a safe location after it was devastated by an earthquake, but the remains of the original town are still around.