21, when the sunset hits the waterfall at the perfect angle. The setting sun transforms Horsetail Fall into a firefall in Yosemite National Park. (Getty Images/Haoxiang Yang/500px) Two weather ...

Horsetail Fall, a seasonal waterfall on the eastern side of El Capitan, only flows in winter and early spring. The Firefall effect happens when: The waterfall has enough water from melting snow.

Yosemite waterfall appears to be 'on fire' due to sunlight ... With just the right conditions, the Horsetail Fall down El Capitan glows orange like molten fire. This natural phenomenon was first ...