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
Oxford Falls, New South Wales Governor of New South Wales (1937–1946). Oxford Falls Post Office opened on 2 January 1924 and closed in 1984. The Oxford Falls are two waterfalls on Middle Creek, which flows north to meet Oxford Creek. Meandering Creek flows into Middle Creek. Wheeler Creek forms part of the border with Cromer. Garigal National Park borders the suburb, to the north. Oxford Falls has a number of trails suitable for mountain bike riding including downhill and free-ride trails. Oxford Falls, New South Wales Oxford Falls is a suburb of northern Sydney, in the state of New South Wales, Australia 20 kilometres north-east