Cabrillo National Monument – CA (NPS photo)Cape Cod National Seashore – MA. (NPS photo)Carlsbad Caverns National Park – NM. (NPS photo)Castle Clinton National Monument – NY. (NPS photo)Cedar Creek & Belle Grove National Historical Park – VA. (NPS photo)Channel Islands National Park – CA. (NPS photo)Chesapeake and Ohio Canal National Historical Park – MD, WV, DC. (NPS photo)Chiackamauga and Chattanouga National Military Park – GA, TN. (NPS photo)Chiricahua National Monument – AZ. (NPS photo)Crater Lake National Park – OR. (NPS photo)Cuyahoga Valley National Park – OH. (NPS photo)
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Death Valley National Park – CA, AZ. (NPS photo)Delaware Water Gap National Recreation Area – PA, NJ. (NPS photo)
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