Have fun in North Cascades National Park, the central unit of the North Cascades National Park Complex, which spans more than 680,000 acres throughout the state of Washington and the Canadian province of British Columbia. The park was established to preserve the North Cascades glacial range, the most expansive system of its kind in the contiguous United States, and its associated waterways and forests. The mostly undeveloped park’s ecosystems are noted for containing the highest level of plant biodiversity of any American national park, offering a wide variety of opportunities for nature exploration, wildlife watching, and photography. Popular wilderness exploration activities for visitors include hiking, camping, and mountaineering (video), which all require a visitor permit. Two visitor centers are located within the park, including the Golden West Visitor Center, which showcases a gallery of works by local artists.