Crystal Cave, Sequoia National Park, California This marble cave in the Giant Forest region is between the Ash Mountain entrance of the park and Giant Forest. The cave is a constant 9 °C °F), and only accessible by guided tour.
Here are 11 Reasons to Visit Sequoia National Park Sequoia National Park, California. Sequoia National Park is known for its giant sequoia trees, including the General Sherman Tree, one of the largest in the world. It stands at 275 feet tall and is belie