California's Yosemite National Park is famous for its ancient giant sequoia trees and massive rock formations. These include El Capitan and Half Dome. However, from mid-to-late February, the main draw is the Horsetail Fall. The seasonal waterfall flows over the eastern edge of El Capitan every winter. During the last two weeks in February, it often transforms into a stunning "Firefall." The natural phenomenon occurs around 5 to 15 minutes before sunset. It lasts just a few minutes.