Upper and Lower Mesa Falls offer views of the Island Park caldera’s edge, dropping 105′ and 65′ respectively. These dramatic drops were created between 600,000 and two million years ago when an immense shield volcano exploded repeatedly finally collapsing, leaving behind the world’s largest caldera. Accessed by turning off of Highway 20 onto State Highway 47 and following the signs, the setting of the falls is the perfect location for a picnic or short hike.