The town is very popular with tourists, especially those from Germany. Some of the most popular tourist attractions of Katwijk are the beach, several museums and galleries of fine art, a railway museum, and some museums of local and regional history. Near Katwijk are the headquarters of the European space organisation ESA with its space travel museum Space Expo (on the town's borders), Duinrell in Wassenaar and Keukenhof in Lisse.
Katwijk is known for its wide-spread graffiti culture. Several legal graffiti places can be found in the town. Graffiti-related activities are often organised, for example covering the local lighthouse with graffiti.
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