The Raleighvallen are located in the Sipaliwini district and together with the Voltzberg form the Ralleighvallen Nature Reserve, which is over 1.6 million ha in size. The Raleighvallen Nature Reserve is part of the Central Suriname Nature Reserve (CSNR).
The entire area is rich in unusual plants and flowers and many animal species. Over 400 different bird species have been observed, including the fire-red, red-green and blue-yellow ravens (macaws), the large tinamoe, the black powisi and the endangered red rock hand.
The area is also home to monkeys, jaguars, giant armadillos and giant river otters. The Raleigh Falls area is characterized by huge geological formations and waterfalls, with some Inselbergs of granite rising out of the forest. The most famous, the 250-meter-high Voltzberg peak, is easily climbed by tourists.