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

A monument to the 16th-century mathemetician who dedicated his life to calculating the numerical value of pi.

A market built atop boats is one of the few floating holiday markets in Europe.

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

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

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

A former plague hospital turned medical museum.

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

Some of the specimens on display at the Leiden University Medical Center have been helping educate physicians since the 17th century.

The world's first transgenic bovine has been preserved at the museum where he spent his final years—though his old stable is now a cafe.

The tallest waterfall in the Netherlands is a lovely, stepped feature that is only 50 feet tall.

The ruins of this Dutch castle sit atop a labyrinth of once-secret tunnels and passageways, dating back over 900 years.

The tallest mountain in mainland Netherlands isn't actually very tall.

A beautiful maze marks where three countries meet.

This disused VLF radio station is no longer in service but the surrounding town still bears its name.