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Dry Tortugas
The Dry Tortugas are a small group of islands, located in the Gulf of Mexico at the end of the Florida Keys, United States, about west of Key West, and west of the Marquesas Keys, the closest islands. Still further west is the Tortugas Bank, which is completely submerged. The first Europeans to discover the islands were the Spanish in 1513, led by explorer Juan Ponce de León. They are an unincorporated area of Monroe County, Florida, and belong to the Lower Keys Census County Division. With their surrounding waters, they constitute the Dry Tortugas National Park.
==Geography==
The keys are low and irregular. Some keys have thin growths of mangroves and various other vegetation, while others have only small patches of grass or are devoid of plant life. In general, they rise abruptly from relatively deep water. They are continually changing in size and shape. The Tortugas Atoll has had up to 11 islets during the past two centuries. Some of the smaller islands have disappeared and reappeared multiple times as a result of hurricane impact.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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