An Extensive Examination of Data Structures. Summary: This article, the second in a six-part series on data structures in the .NET Framework, examines three of the most commonly studied data structures: the Queue, the Stack, and the Hashtable.
Dry Tortugas National Park Dry Tortugas National Park is a national park in the United States about 68 miles (109 km) west of Key West in the Gulf of Mexico. The park preserves Fort Jefferson and the seven Dry Tortugas islands, the westernmost and most isolated of the Florida Keys.
1 The seven islands in the national park are Garden Key, Bush Key, Loggerhead Key, East Key, Middle Key, Hospital Key and Long Key.  The Dry Tortugas are located on the edge of the main shipping channel between the Atlantic Ocean, the Caribbean and the Gulf of Mexico.