Parking can be a problem when many people drive to the same place to go hiking. A series of trails encircle Yosemite Valley, high above the crowds and traffic. Many natural areas, such as the floor of Yosemite Valley, are accessible to wheelchairs. Trails have been built to some seemingly inaccessible viewpoints. This group of blind students are following a handrail behind the waterfall, listening to the water rush past.
Trails lead from the floor of Zion Canyon to viewpoints on the rim.