A free, self-guided GPS audio walk through how Amsterdam built the world's most famous cannabis culture without ever legalizing it. Coffeeshops have sold cannabis openly since the 1970s under gedoogbeleid — a toleration policy, not a law — and the sale itself is still, technically, illegal. This walk has 9 stops, from the Provo happenings at Spui to the Dam, tracing the coffeeshop from invention to backdoor paradox. Walk it on location with GPS, or follow along from anywhere.