Some essential safety tips to remember when visiting Yellowstone are that geysers are often boiling, and some are acidic, so they are not for swimming. Remain on trails, boardwalks, or other designated paths while viewing them. Additionally, do not throw coins, sticks, or other garbage into geysers as it can clog them, eventually altering their natural process. Yellowstone is home to an abundance of creatures, but they are all wild and should not be approached by visitors. Observe everything from a safe distance.