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

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.

People have been placing babies on these lilies for photoshoots since the Victorian era.

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

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

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