Isalo National Park is a protected area renowned for its vast eroded sandstone formations, deep canyons, and grassland landscapes. The park's geology is characterized by Jurassic sandstone that has been sculpted by wind and water over millions of years, creating a dramatic and rugged terrain. A significant feature is the Canyon des Singes, which is inhabited by troops of ring-tailed lemurs. The park also contains several natural swimming pools, such as the Piscine Naturelle, fed by permanent springs, which are popular among visitors. The area holds cultural importance with several burial sites of the Bara people, an indigenous ethnic group, integrated into the rock formations. The park's biodiversity includes various endemic plant species, such as the elephant's foot plant and several aloes, adapted to the arid environment. The climate is tropical and dry, with a distinct rainy season from November to April. Guided tours are mandatory for all visitors to ensure safety and the protection of the natural and cultural heritage.