Himachal’s best kept secret, enclosed by the great Himalayan national park with flowing rivers, lush green valleys and lakes, Tirthan valley is one of the most beautiful places in Himachal. it draws its name from Tirthan river, which originates from the glaciers of Himalayas. this is an area of exceptional beauty and mountain scenery, unspoiled villages and nature, great walks and inviting guesthouses. it’s the gateway to the spectacular, world heritage–listed great Himalayan national park, 754 pristine square kilometres of steep- sided river valleys and mountains reaching right up to the 6000m-plus peaks of the Great Himalayan range. Jalori Pass, chaini fort, Shringa Rishi temple, Serolsar Lake, 360° view point are some of the places to look out for while exploring the Tirthan valley.