Jaisalmer Fort in Rajasthan is Known as ‘Sonar Quila’ or ‘The Golden Fort’. It is a World Heritage Site. It was built in 1156 AD by the Rajput ruler Rawal Jaisal, from whom it derives its name. The fort stands amidst the sandy expanse of the great Thar desert, on Trikuta Hill. The fort's massive yellow sandstone walls are a tawny lion colour during the day, fading to honey-gold as the sun sets, thereby camouflaging the fort in the yellow desert. For this reason, it is known as the Sonar Quila or Golden Fort.