Originally this mountain ridge was covered with tropical rain forest, but since 1900 it has been cut and a barren and eroded land remained. In 2001, Masarang purchased the land (a total of around 500 hectares) and started a reforestation program in which, together with a number of other smaller areas, already more than 1 million trees have been planted. In the project also an Arboretum has been established, where seedlings of endangered species are bred and a number of tree species are planted in a special section as a learning area and to obtain the seeds.