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
Kaieteur National Park trail to the Korume Creek, then up the Korume Creek to its source, then to and including Menzies landing on the left bank of the Potaro River, then across the Potaro River to its right bank, then inland for a , then downwards and parallel to the right bank of the Potaro River to an unnamed tributary about below the foot of Tukeit Falls, then down the left bank of that tributary to the Potaro River, then to the point of origin. In 1999 the Park's area was increased from to by a Presidential Order. Kaieteur National Park Kaieteur National