With more than 60 national parks, plus hundreds of national monuments, seashores, preserves, battlefields, and more, our National Park System offers visitors more than 85 million acres of beautiful, protected public land. History buffs, nature enthusiasts, extreme sportspeople, and laid-back campers alike can find fun, tranquility, and unbelievable scenery, from Yellowstone's geysers and springs to the Everglades' gator-filled swamps. Iconic outdoor destinations like Great Smoky Mountains National Park and the Grand Canyon are justifiably popular, but there are many lesser-known sites to discover, both in the U.S. and abroad.