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 Sioux Falls, South Dakota Sioux Falls () (Lakota: "Íŋyaŋ Okábleča Otȟúŋwahe"; "Stone Shatter City") is the most populous city in the U.S. state of South Dakota and the 143rd-most populous city in the United States. It is the county seat of Minnehaha County and also extends into Lincoln County to the south. It is the 47th-fastest-growing city in the United States and the fastest-growing metro area in South Dakota, with a population increase of 22% between 2000 and 2010. As of 2018, Sioux Falls had an estimated population of 183,200. The metropolitan population of 259,094 accounts for 29% of South