Guyana the dryer savannah areas in the south-west; and the smallest interior lowlands (interior savannah) consisting mostly of mountains that gradually rise to the Brazilian border. Some of Guyana's highest mountains are Mount Ayanganna (), Monte Caburaí () and Mount Roraima ( – the highest mountain in Guyana) on the Brazil-Guyana-Venezuela tripoint border, part of the Pakaraima range. Mount Roraima and Guyana's table-top mountains (tepuis) are said to have been the inspiration for Sir Arthur Conan Doyle's 1912 novel "The Lost World". There are also many volcanic escarpments and waterfalls, including Kaieteur Falls which is believed to be the largest water
Sioux Falls, South Dakota four counties, all of which are located in South Dakota: Lincoln, McCook, Minnehaha, and Turner. The estimated population of this MSA in 2017 was 259,094, an increase of 13.51% from the 2010 census. According to recent estimates, Lincoln County is the sixteenth-fastest-growing county (by percentage) in the United States. In addition to Sioux Falls, several cities and towns included in the metropolitan area are Canton, Brandon, Dell Rapids, Tea, Harrisburg, Worthing, Beresford, Lennox, Hartford, Crooks, Baltic, Montrose, Salem, Renner, Rowena, Chancellor, Colton, Humboldt, Parker, Hurley, Garretson, Sherman, Corson, Viborg, Irene, and Centerville. Sioux Falls has more than 70 parks and