The fallen Tunnel Log of Sequoia National Park came into being after an unnamed giant sequoia fell across the Crescent Meadow Road in late 1937 as a result of natural causes. The following summer, a tunnel was cut through the fallen log as a visitor attraction. The tunnel, which remains in use today, is 17 feet wide and 8 feet high. There is a bypass for taller vehicles. When the giant sequoia fell, the tree stood 275 feet high (83.8 meters) and was 21 feet in diameter at the base (6.4 meters). The tree's age when it fell has not been determined, but probably exceeded 2,000 years.