Watch the ‘Firefall’ phenomenon at El Capitan inside Yosemite National Park
Videos from Yosemite National Park show the iconic "Firefall" phenomenon glowing at Horsetail Fall inside California's crown jewel.
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Savonoski Crater: The mysterious, perfectly round hole in Alaska that scientists can't explain
The Savonoski Crater is a round hole in Alaska's Katmai National Park that has defied scientific explanation ever since it ...