Cat-lovers may want to check out this quirky boat on the Singel. It was founded in 1966 by a local woman who became legendary for looking after several hundred stray cats at a time. The boat has since been taken over by a foundation and can hold some 50 kitties in proper pens. Some are permanent residents, and the rest are ready to be adopted (after being neutered and implanted with an identifying computer chip, in line with Dutch law).