For a few weeks in February, a spectacular sight draws crowds of visitors to Yosemite National Park. Each day, just before sunset, Horsetail Fall on the eastern edge of El Capitan gets a back-lit glow ...

"Firefall" occurs when the sun is setting as beams of sunlight shine down on Horsetail Fall at a particular angle. As it does, the water shines bright and looks like a river of molten lava from a ...