The crystal clear waters of Sungai Lompat are testimony to this as is the undisturbed primary forests that dress the rivers valleys, lowlands and hill dipterocarp forest zones with its lush greenery. Seraya, laurels, oaks, mosses, orchids, pitcher plants and ferns make up the typical landscape here.

The abundance and diversity of the flora and fauna here have been recognized by scientists and researchers alike, prompting them to use the reserve as a natural laboratory to study the behavioral patterns of several primate species like gibbons, bats and forest plants.