An abandoned 6th-century monastery features a medieval map of the known world.

One of the world's largest pyramids stands within El Mirador, the "lost city of the Maya."

An unexpected ghost village lurks on the southeast coast of Tenerife.

An early masterpiece of Le Corbusier, a famed Modernist architect, hiding in plain sight.

This stone in Lake Geneva was once the reference point used to determine altitude in Switzerland.

A plain wooden seat that once belonged to one of the most prominent figures of the Protestant Reformation.

A treasure trove of scientific instruments from the 17th and 18th centuries.

The world's largest second-hand graces a clock surrounded by constantly changing flower beds. 

An opulent monument built for a duke who donated his entire fortune to the city of Geneva.

One of the most historical literary characters continues to stroll his hometown.

France's national museum of scientific and industrial instruments.

The largest underground lake in Europe.

View the ancient remains of buildings and the ancient "River of Hades" before hopping on a train.

This 7th-century monastery was sacked by Saladin.

The small cliffside monastery known as the Tiger's Nest is said to be the meditation site of an 8th-century Buddhist master.

This Art Nouveau mansion was used as the "House of the Screaming Child" in Dario Argento’s giallo classic.

Watch cheese-flipping robots in action at this factory and museum.

This statue pays tribute to the iconic musician in the place where he recorded his final studio album.

Heralded as the world's first theater, these ruins are often overlooked as they reside in the shadows of the Acropolis.

An ancient octagonal weather station named for the eight Greek gods of wind.

Two of the few remaining life-sized Greek bronzes were submerged in the sea for over 2,000 years.

One of the oldest and most significant collections of Ancient Egyptian archeology outside of Egypt.

This amazing medieval fortress stands atop a promontory along the famous Cinque Terre.

Before it was buried by volcanic ash, this fast-food restaurant fed the hungry hordes of ancient Rome.