From personal experience, I strongly recommend AGAINST visiting the Anne Frank house on weed.
I will have to disagree with you here. There is NOTHING in Amsterdam that shouldn't be done on weed. But if I ever get the opportunity to go back again, I'm just gonna spend all my time baked out of my gourd at the Van Gough Museum. That was by far the coolest, most interesting thing I can remember seeing while I was there.