Sanjay Gandhi National Park, also known as SGNP, is an 87 km2 (34 sq mi) protected area in Mumbai, Maharashtra. It was established in 1969 with its headquarters situated at Borivali. The 2400-year-old Kanheri caves, sculpted by monks out of the rocky basaltic cliffs, lie within the park. The rich flora and fauna of the Sanjay Gandhi National Park attract more than 2 million visitors every year.