An unassuming rod in the Netherlands was once the old standard unit of length for the entire Dutch empire.

A trio of red, white, and blue stones embedded in the streets of Leiden are markers of medieval territory and law.

A 14th-century church holds a unique monument to a German mathematician who dedicated his life to calculating the value of pi.

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

This 17th-century house has a long and colorful history.

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

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

A memorial commemorating the man whose name became synonymous with taking a picture in the Netherlands.

One of Hollywood's most iconic actresses was born in an upscale Brussels neighborhood in 1929.

A largely overlooked statue that may commemorate the first publication of 'Don Quixote' outside of Spain.

A fantastical 13th-century fortification sandwiched by a modern hotel in central Brussels.

Belgium's national heroine turned spy sacrificed her life to combat German occupation.

A shining memorial to a Belgian hero is said to bring luck to anyone who touches it.

Known as "The Spewer," this bizarre fountain has an even stranger urban legend behind it.

Brussels' favorite peeing boy has a sister.

Cozy basement bar sports an inventory of over 2,000 beers.

This cannonball has been lodged in the church wall since a 1695 bombardment destroyed the city center.

Climb inside an iron crystal magnified 165 billion times its normal size.

A bronze statue of the fictional character nicknamed "Mrs. Hat" from a beloved Belgian comedy.

A little sculpture with a large wardrobe.

This 18th-century sundial was designed to calculate the date of Easter each year.

One of Jeff Koons’s largest sculptures and his first commemorative work.

This bridge was constructed from the rubble of the infamous Bastille.

A historic observatory now an astronomy museum beautifully situated at the moat of the Middle Age city centre.