Jaisalmer Fort, India On a hilltop in the Thar Desert, the high sandstone walls of the Jaisalmer Fort overlook ancient trade routes between Arabia and India. Built in 1156 by Raja Jaisal, it is the second-oldest fort in Rajasthan and has endured a history of attacks. Send us your photos of the Jaisalmer Fort. Once we have enough pictures (it takes about 300) we'll create a Photosynth.