Redwood trees view from cave at Jedediah Smith Redwoods State Park, California, USA
Natural pool in cave at Charco Azul near El Golfo, El Hierro Island, Canary Islands, Spain
Cave and Waterfall, Johnston Canyon, Banff National Park, Alberta, Canada
View of Uchisar castle from Pigeon Valley, Cappadocia, Turkey
Tianmen cave in Tianmen Mountain National Park, Zhangjiajie, Hunan Province, China
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