Nahan is situated on an isolated ridge in the Shiwalik hills, overlooking greenfields. Nahan is a well laid-out picturesque town, known for its cleanliness and dust free streets. Saint and princes are linked with the origin of Nahan. The city was founded as a capital by Raja Karan Prakash in 1621. Another version recalls a saint who lived with a companionable Nahar on the site where the Nahan palace now stands "Nahar" means a Lion and probably the town takes its name from this saint. Nahan situated at an altitude of 932 meters, is a good base for visits to the surrounding areas viz. Renuka, Paonta Sahib, Trilokpur temple and the Suketi Fossil Park. It has a pleasant climate throughout the year and is watered by man made lake and decorated with temples and gardens. It is the headquarter of Sirmaur district.