Countries Where Tourists Are No Longer Welcome

18. Various National Parks, USA (Timed Entry Systems): Managing Congestion

Many popular U.S. National Parks, including Yosemite, Glacier, Zion, Arches, and Rocky Mountain, have implemented or are piloting timed entry permit systems. This isn't a "no tourists" policy, but a sophisticated crowd management strategy. The goal is to reduce congestion on roads and trails, protect natural resources from overuse, and enhance the visitor experience by preventing overcrowding during peak seasons. It signifies a move towards controlled access for preservation and quality, rather than open-door visitation.