Jaisalmer, the sun city of Rajasthan is one of the largest fully preserved fortified cities in the world. It is situated in the city of Jaisalmer, in the Indian state of Rajasthan. It is a World Heritage Site. 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.
The fort has four entrances to the townside, one of which used to be guarded by cannon.