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
Bonita Falls in many parts with graffiti and litter. The falls are usually flowing year-round and the lower falls are reached via a popular, approximately 3/4 mile (1200 m) hike (each way). The first 1/2 mile (800 m) follows the South Fork Lytle Creek wash to a side trail that takes you approximately 1/4 mile (400 m) to the base of the falls. The trailhead for the falls is an unsigned turnout parking area along Lytle Creek Road, one mile past the Front Country Ranger Station in Lytle Creek. A National Forest Adventure Pass is required to park there and on summer