The Kaas Plateau, also known as the Kaas Pathar is a plateau situated 25 kilometres west from Satara and is declared as a UNESCO World Natural Heritage Site in 2012. It is a biodiversity hotspot known for various types of seasonal wild flowers bloom and numerous species of endemic butterflies annually in the months of August and September. The plateau is situated at an altitude of 1200 metres and is approximately 10 square kilometres in area. Kaas has more than 850 different species of flowering plants. These include orchids, shrubs such as the Karvy, and carnivorous plants such as Drosera Indica.It is situated high hill plateaus and grasslands turn into a 'valley of flowers' during monsoon season, particularly from August to early October. Kaas Plateau has more than 150 or more types of flowers, shrubs and grasses. The orchids bloom here for a period of 3–4 weeks during this season. Kaas lake (built 100 years ago) is a perennial source of Water supply for western part of Satara city.