Yosemite National Park is internationally recognized for its spectacular granite cliffs, waterfalls, clear streams, giant sequoia groves, and biological diversity. Located in the Sierra Nevada mountains, the park contains thousands of lakes and ponds, streams, and hundreds kilometers of hiking trails. Yosemite National Park vividly illustrates the effects of glacial erosion of granitic bedrock, creating geologic features that are unique in the world. Repeated glaciations over millions of years have resulted in a concentration of distinctive landscape features, including soaring cliffs, domes, and free-falling waterfalls. There is exceptional glaciated topography, including the spectacular Yosemite Valley, a 914-meter deep, glacier-carved cleft with massive sheer granite walls.