The Doon valley contains the settlements including Raiwala, Rishikesh, Doiwala, Harrawala, Dehradun, Herbertpur, Vikasnagar, Sahaspur, Selaqui, Subhash Nagar and Clement Town. The district houses Rajaji National Park which is home to several elephants, Benog Wildlife Sanctuary at Mussoorie & Asan Conservation Reserve (Asan Barrage). The Doon Valley has the Terai and Bhabar forests within it as well as the Shivalik hills and Lesser Himalayan Range containing hill stations such as Mussoorie and Chakrata. The district is bordered by the Himalayas in the north, Rajaji Range of the Sivalik Hills to the south, the river Ganges to the east, and the Yamuna river to the west. Towns in the foothills of the mountain ranges include Sahastradhara, Lakhamandal, Gautam Kund, Chandrabani, Kalsi and Dakpathar.