‘Firefall’ optical illusion lights up Yosemite National Park – CNN News Featured International ‘Firefall’ optical illusion lights up Yosemite National Park – CNN News Editor February 15, 2017 It’s the time of year for the mesmerizing phenomenon “firefall” to illuminate Horsetail Fall in Yosemite National... Read More Read more about ‘Firefall’ optical illusion lights up Yosemite National Park – CNN News