Related by context. Frequent words. (Click for all words.) 60 Hawai'i Volcanoes National 60 Sunset Crater 60 Wupatki 55 Prescribed burn 55 Na Pali Coast 55 Hawaii Volcanoes National 55 Yellowstone Yosemite 54 Rwenzori Mountains 53 Montezuma Castle 53 Arenal Volcano 53 Lassen Peak 52 By Richard Trapunski 52 alpine tundra 52 cinder cone 51 Kenai Fjords National 51 Haleakala 51 Wilderness Preserve 51 Phong Nha Ke Bang 51 Norris Geyser Basin 51 Interment Cathedral 51 Guided hikes 51 Wildfire Burns 51 volcanic peaks 51 Tortuguero 51 Rose Atoll 51 Kilauea Volcano 51 Long Term Ecological 50 spews ash 50 Cagsawa 50 Cedar Breaks 50 Hanford Reach National 50 Mount Lassen 50 Percent Contained 50 Kilauea summit 50 Guadalupe Mountains 50 http:/www.npsp.com 50 glacier carved 50 Scenic Area 50 scenic overlooks 49 Geological Survey Hawaiian Volcano 49 Gila Cliff Dwellings 49 Lassen Volcanic National 49 Taroko Gorge 49 Bandelier National 49 geomorphological 49 Nyiragongo 49 Canopy Tours 49 Halemaumau Crater 49 RMNP 49 Scott Shalaway 49 nitrogen deposition 49 Anza Borrego 49 ancient petroglyphs 48 subsidiaries RLI 48 eruptive activity 48 guided snowshoe 48 Mount Ruapehu 48 volcano observatory 48 # SW Terwilliger 48 Shiveluch 48 Zion Canyon 48 By ALLEN GEMAEHLICH 48 Rainforest Adventure 48 parks wildlife refuges 48 Miami citywide countywide 48 Rattlesnake Mountain 48 Waterton Glacier International 48 Tongariro National 48 extinct volcano 48 hiking horseback riding 48 Pu'u 48 Dolly Sods 48 Crater Lake 48 Greater Yellowstone Ecosystem 48 Papahanaumokuakea 48 BY WENDY PITLICK Black 47 alpine glaciers 47 Holden Arboretum 47 Herschel Space 47 volcanic cone 47 www.parks.ca.gov 47 Lake Manyara 47 Missing Hiker 47 Madera Canyon 47 Yellowstone Volcano Observatory 47 Casa Grande Ruins 47 By KENT MINCER 47 Lava flows 47 mountain meadows 47 By GARY HARMON 47 atop Mauna Kea 47 ecoregion 47 Osa Peninsula 47 Clingmans Dome 47 Incan ruins 47 Ngorongoro Crater 47 Griffith Mortuary 47 Parks Botanic Garden 47 Forces Evacuations 47 Linville Gorge 47 Cayuse Pass