Not a traditional "museum" by any stretch, but with Amsterdam being the city boasting the world's…read moremost museums, I can see how the claim is made with places like this. It's a really nice spot, and the guy who runs it is extremely open and friendly with a wealth of information. He truly lives for this!
If you arrive before it opens, you'll see people gathered around the door entrance, and you're there wondering what kind of place this really is. Doesn't look big from the outside at all, and looks like a shop more than a museum. Once you get inside the small space, you're greeted with black lighting above which illuminates all of the fluorescent artwork. There are paintings and sculptures with bright colors across the spectrum. Then you walk down these steps into the dark basement and see his special rock collection with the makeup of the rocks highlighted under the black lighting. Reminded me of geology class.
Cool place, quick 30 minute experience.