The four major trekking destinations in Arunachal include Pasighat-Jengging-Yinkiang, Bhalukpong-Bomdila-Tawang, Roing-Mayodia-Anono and Tezu-Hauliang. The first trek starts from the plains of Siang and leads through the thick forest area. The second route passes trough the Tipi orchidarium to Bomdila. All through the way the Kameng River roaring down the hill provides excellent scope for angling, trekking and hiking. On the third trekking route the main trekking spots are Mehao Lake Sanctuary and boating in Salley Lake. The hills of Tezu-Hayuliang are Arucnachl's natural treasure house and are ideal for hiking and bird watching too.