Rocky Arbor State Park

Rock and Wood, originally uploaded by jw_creations.

Rocky Arbor State Park is a 231 acre Wisconsin state park in the Wisconsin Dells region. The park was established in 1932 to protect sandstone outcrops eroded into picturesque walls and ledges.

The region is formed from Late Cambrian sandstone deposited 500 million years ago at the bottom of shallow inland seas. Much later the Wisconsin River flowed over this tract of land, carving channels into the sandstone. The river has since changed course, now running 1.5 miles to the east, leaving the rock walls of its former gorge exposed. A small creek now flows through the park, though in the opposite direction as the river once did.