From toppling ancient rock formations in England to vandalizing Rome’s iconic Colosseum, tourists looking to create an unscripted experience are getting bolder by the year. Combined with hundreds of burns, broken bones, and other “selfie injuries,” careless visitors inflict on themselves each year, it’s no wonder that several destinations have decided to curtail the free-for-all by requiring those who want to visit to work with an official guide. This serves not only to safeguard visitors but to protect destinations and ensure environmental conservation. Plus, guides will enrich any experience with stories, secret spaces, and fun facts. Here are six of the best guide-only destinations around the world.