[Lee Stewart]

Horsetail Fall is a seasonal waterfall that flows down the east face of El Capitan (a vast rock formation in California’s Yosemite National Park) in winter and early spring. It's a sight to behold in and of itself, but during a 10-minute window over a few days in mid-to-late February it becomes even more special. The setting sun tilts at just the right angle and casts a glowing light that transforms the spectacle into a 'firefall', so named for its likeness to free-flowing lava.