Naggar Castle served as the royal residence for over 1460 years. Constructed primarily of wood and stone, it reflects the architectural styles prevalent during the reign of Raja Sidh Singh. In the mid-17th century, Raja Jagat Singh shifted the capital to Sultanpur (Kullu), but the castle retained its importance. Later, it was occupied by the British and eventually transformed into a rest house before becoming the heritage hotel it is today. The castle stands as a testament to the region's historical transitions and architectural heritage.