Udzungwa National Park is a lush high-elevation rain forest and a great site for walking and moderate hiking. It is one of thirty-four “World Biodiversity Hotspots” and one of 200 World Wildlife Federation ecoregions of global critical importance. The Udzungwa forest is part of the so-called Eastern Arc, which is a series of mountains ranging from the Southern Highlands through the Uluguru and Usambara mountains northwards to Pare. The forest is home to many indigenous species of plants, mammals, reptiles, amphibians, birds, butterflies, and insects of which some of species are found nowhere else in the world. Udzungwa is also a unique cultural site for containing caves that have been used in the spiritual traditons and rituals of nearby tribes over many years—these have remained preserved so that one can get a sense of ancient religious traditions upon visiting.