The three major types of geological formations found in the park are volcanic cones, glacis slopes, and soufrières (sulphur deposits).

All the major waterways of the southern half of the island emanate from here, and there are spectacular waterfalls, creeks, rivers, pools, and natural lakes.

However, there is a small quarry and some limited farming in the southern portion; the government's electric utility company has certain rights, but these are being used for hydropower and the extraction of geothermal energy.

A proposal to encourage tourism by the construction of a cable car overhead was defeated, but a fine balance needs to be struck between human aspirations and the maintenance of biodiversity and the unique landscape.

At higher altitudes, the trees become smaller, and there are mountain palms, ferns, and hibiscus, while near the summits there is dwarf forest with low, branching shrubs, mosses, and lichens.

[5] Mammals found in the park include agoutis, wild pigs, common opossums, numerous small rodents, and bats.