The annual ‘firefall’ phenomenon has returned to the Horsetail Fall at Yosemite National Park.The optical illusion gives the appearance of lava streaming down the cliff and is caused by the angle of light coming off a sunset, the CNN reports. The ‘firefall’ reappears for around two weeks every February and draws lots of visitors to the park, including professional photographers and tourists armed with Instagram.
https://www.yahoo.com/news/yosemite-national-park-annual-firefall-140347914.html
