The main tourist facilities are located in the northeast corner of the park at "Topslip", so named because of the local 19th century practice of sliding timber logs down the hills from here.[5] By the mid-1800s, large tracts of Valparai plateau in the Anamalais were under intense tea or coffee plantations after deforestation of the natural forests.Since most native inhabitants either refused to work or were inefficient workers, labour for plantations was brought from the plains of Tamil Nadu to clear forests and grow coffee.This part of the Western Ghats, under the Madras Presidency were exploited extensively for teak which was supplied to the Bombay Dockyard for shipbuilding and later for railroad ties.The core area of Manjampatti Valley is a 110 km2 (42 sq mi)with a drainage basin at the eastern end of the park.The diverse topography and rainfall gradient allow a wide variety of vegetation comprising a mix of natural and human-made habitats.Tree cover is provided by Hopea parviflora, Mesua ferrea, Calophyllum tomentosum, Vateria indica, Cullenia excelsa and Mangifera indica, Machilus macrantha, Alstonia scholaris, Evodia meliaefolia, Ailanthus and Bombax ceiba and Eucalyptus grandis.Some of the most important groups are cormorants, ducks, teal, darter, partridge, quail, jungle fowl, spurfowl, Indian peafowl, parakeets, hornbills, Asian barbets, drongos, orioles, shrikes, warblers, Old World flycatchers, woodpeckers, leafbird, trogons, kingfishers, storks, egrets, Lesser fish eagles, hawk eagles, harriers, falcons, kites, owls and nightjars.