If you decide to enjoy the warm waters of the Crater, you’ll need to buy a ticket. The Homestead Resort, where the Crater is located, sells tickets based on the type of activity you’d like to do. Swim/soak, scuba diving, or snorkeling options are available. For a discounted price, you can purchase your tickets directly from Zermatt. However, please be aware that tickets must be purchased 10 days in advance of your visit.