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Wind Cave National Park Cave / Karst Systems
Wind Cave National Park was established January 9, 1903. It has over 117 miles of explored passageways and is one of the longest, most complex caves in the world. Amazingly, judging from airflow at the entrance an estimated 95% of the cave still awaits discovery. Its unseen depths provide opportunities for cave explorers to experience a true frontier, a place where people have never before ventured. It is the seventh national park in the world and the first to protect a cave.
Maine ocean islands provide the only nesting sites for Atlantic puffins in the United States. Eastern Egg Rock in the midcoast region, Seal Island and Matinicus Rock at the mouth of Penobscot Bay, and Machias Seal Island and Petit Manan Island off the downeast coast provide habitat for more than 4,000 puffins each summer.