Named for the biblical warrior, the largest castle in Israel actually dates to the Middle Ages.

This 11th-century castle sits so low you can't see it behind the surrounding buildings.

Science meets wall art to highlight the beauty of famous mathematical equations.

One of the Leiden's oldest pubs is also the birthplace of the Heineken star.

This early 19th-century graveyard is the final resting place of Vincent van Gogh's mother.

The works of poetry's biggest names grace the walls of the city of Leiden, all carefully painted by hand.

The remnants of a WWI naval mine that once terrorized the country now decorates a street.

One of the great math minds of the 17th century is underfoot in this 900 year old Dutch church.

A relic of the old jail still stands in its original location.

An ancient Egyptian temple sits within a modern European museum.

This public library and its impressive collection of academic books have not changed since the 17th century.

Graffiti covers the walls of a room where university students through the centuries have waited nervously to defend their theses.

A 'living museum' in Leiden, the oldest of its kind in the Netherlands.

Devious political maneuvering and four ancient, working telescopes are central to the world's second-oldest observatory.

Hidden within a Netherlands crater is a stone bed that lets those who lie in it see the sky as a curved surface.

In the Netherlands, one of the world's largest private car collections can be found.

Rumored to have been frequented by Vincent van Gogh, it's the only remaining genever producer in the Hague.

A preserved building where the dead were once watched for signs of life.

The location of the world's first telescope demonstration.

Eyam took steps to quarantine themselves and keep the plague from spreading.

A botanically themed auditorium blooms within the world’s last operating double-decker theater.

This otherwise ordinary close on the Royal Mile constituted the end of the world for Edinburgh’s poorest residents.

Tucked away behind an unassuming set of shops is a must-see series of stunning murals.

A US military accident created the legends behind this Mexican version of the Bermuda Triangle.