Rijksmuseum Boerhaave

The Hortus botanicus of Leiden is the oldest botanical garden of the Netherlands, and one of the oldest in the world. It is located in the southwestern part of the historical centre of the city, between the Academy building and the old Leiden Observatory building.

Naturalis Biodiversity Center (Dutch: Nederlands Centrum voor Biodiversiteit Naturalis, Naturalis for short) is a national museum of natural history and a research center on biodiversity in Leiden, Netherlands. It was named the European Museum of the Year 2021.

The Burcht van Leiden (Dutch pronunciation: [ˈbʏr(ə)xt fɑn ˈlɛidə(n)]; Fort of Leiden) is an old shell keep in Leiden constructed in the 11th century. It is located at the spot where two tributaries of the Rhine come together, the Oude Rijn and the Nieuwe Rijn.

De Valk is a tower mill and museum in Leiden, Netherlands. The current tower mill is the third mill built at this location.