Tucked away near the souther border, Big Bend National Park is a sprawling complex of outdoor activities. The park is a major regional attraction, netting over 300,000 annual visitors. Hikers can trek alongside the Rio Grande, wander through the forested Boot Canyon, climb high into the Chisos Mountains, and sink low into the south Texas desert. The backcountry features 42 permit-required campsites, and unmarked, off-road terrain. After a long day of hiking visitors can look up to the stars: Big Bend is an International Dark Sky Park.