Watch Mother Nature's 'Firefall' optical illusion light up Yosemite National Park

Mother Nature is again putting on a show at California's Yosemite National Park, where every February the setting sun draws a narrow sliver of light on a waterfall to make it glow like a cascade of molten lava.

The phenomenon known as "firefall" draws scores of photographers to a spot near Horsetail Fall, which flows down the granite face of the park's famed rock formation, El Capitan.