PRNL meaning in General ?

Pictured Rocks National Lakeshore is a U.S. National Lakeshore on the shore of Lake Superior in the Upper Peninsula of Michigan, United States. It extends for 42 miles (67 km) along the shore and covers 73,236 acres (114 sq mi; 296 km2). The park has extensive views of the hilly shoreline between Munising and Grand Marais in Alger County, Michigan, with picturesque rock formations, waterfalls, and sand dunes.

Pictured Rocks derives its name from the 15 miles (24 km) of colorful sandstone cliffs northeast of Munising. The cliffs reach up to 200 feet (60 m) above lake level. They have been naturally sculptured into a variety of shallow caves, arches, and formations resembling castle turrets and human profiles. Near Munising, visitors can also visit Grand Island, most of which is included in the separate Grand Island National Recreation Area.

The U.S. Congress designated Pictured Rocks the first National Lakeshore in the United States in 1966. It is governed by the National Park Service (NPS), with 22 year-round NPS employees as of May 2006, and received 476,888 visitors in 2005.