There are no tickets to buy for the Open Harlingen Museum, as it is a free, open-air museum spread throughout the city.
Since the Open Harlingen Museum functions as a street-level museum where the city's historical sites and information panels are publicly accessible, there are no admission tickets to purchase. You do not need to visit a specific ticket counter or desk to begin your exploration.
However, if you wish to obtain a detailed map, a printed guide, or an audio guide that complements the museum experience, you can typically purchase these at the local VVV (Tourist Information Office) in Harlingen. These supplementary materials are optional and enhance the self-guided tour but are not required to access the museum's core content.