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
Flag of Sioux Falls, South Dakota Flag of Sioux Falls, South Dakota The flag of Sioux Falls, South Dakota, consists of a zigzag pattern of thin white and blue lines, which divides an upper blue portion and a lower pinkish-red portion, and a yellow sun in the upper left corner. The zigzag represents the namesake falls of the Big Sioux River. The blue color and the sun allude to the flag of South Dakota. The pinkish-red portion represents the Sioux Quartzite nearby. The upward direction of the design represents the growth of Sioux Falls. The red, white and blue colors included in the flag are also