South Dakota is a perfect balance of scenic brilliance and a rich cultural heritage. The Black Hills, in the southwestern part of the state, is one of the treasures of the world. Its unique rock formations and mysterious caverns, demonstrated by such wonders as the wind caves and Crystal Cave Park are unprecedented. South Dakota's Custer State Park is filled with thousands of roaming bison and wild animals; the Badlands are another geological marvel, with ridges and cliffs covered in a blanket of white sediment. And don't forget Mount Rushmore in Keystone. The Southeast part of South Dakota is home to many lakes and three major rivers. It is a haven for fisherman, hunters, golfers and skiers alike.