If you don’t have a permit and want to know what BASE jumping feels like, the only place in the U.S. to do that is Perrine Bridge. Leaping off the 1,500-foot structure and opening a parachute midair is one of the best adventures in Idaho. You can jump off the Perrine Bridge year-round. You will be flying down to the canyon floor under the bridge – the ultimate thrilling feel. You can see what it looks like in this video.