Horsetail Fall is located in Yosemite National Park, California (USA) and it is a seasonal waterfall that flows during the winter season. If Horsetail Fall is flowing in February and the weather conditions are just right, the setting sun illuminates the waterfall, making it glow orange and red. This natural phenomenon is often referred to as the "Firefall". The total height of this waterfall is about 2,000 feet!