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cool site! used it immediately to check if there are interesting places to add to my next trip. "normal" museums bore me.

May I suggest two additions? Kassel, Germany has two weird ones: A museum for death culture (Sepulkralkulturmuseum, https://www.sepulkralmuseum.de/), and a museum of wallpaper (https://www.tapeten.museum-kassel.de/) :)