Firefall at the Horsetail Fall at Yosemite National Park on February 11. For about 10 days each February, the waterfall is lit up when the sun sets at a specific angle.Around the second week of February, the setting sun hits Horsetail Fall at just the right angle to illuminate the upper reaches of the waterfall. When conditions are perfect, Horsetail Fall glows orange and red at sunset. California has received a lot of rain recently and the falls are flowing nice and strong. Credit: Kevin Key via Storyful">