16 Best Swimming Holes in the U.S.
"At Missouri's Johnson's Shut-ins State Park, visitors can discover a series of natural swimming holes. The pools, referred to as "shut-ins," are so named because of their rocky sides, which were carved out by the East Fork of the Black River to create closed-off swimming areas. Look around while taking a dip, and you'll find yourself surrounded by volcanic rocks more than a billion years old. The park is also home to hiking and equestrian trails that make for a memorable day of exploration before or after your swim." - Travel + Leisure Editors
