Founded by Guru Dronacharya, according to the epic of Mahabharata, Dehradun is today one of the most developed cities of India. Situated on the threshold of a world full of adventure, spiritualism and tranquility, amidst the Shivalik ranges, the foothills of Himalayas, Dehra Dun is an entry point for all the trekkers and mountaineers onto their journey into the Garhwal Himalayas. A gateway to the popular hill station of Mussoorie and the pilgrimage centres of Haridwar and Rishikesh, Dehra Dun boasts of the famous Forest Research Institute and the Indira Gandhi National Forest Academy. Dehradun, the city, headquarters of the district is visited by a large number of tourist every year, many of them en-route to Mussoorie. The climate of the city is temperate. Even during summer, it is not so warm at Dehra Dun as in the district south of it. Besides, headquarters of the important establishment like the Oil and Natural Commission; Survey of India etc., the Military Academy are also located here. The other places of importance is the Robber's cave, situated at a distance of about 8 kms from Dehra Dun.