The Jaisalmer Fort is one of the largest forts in the world and is quite old, too. It was built in 1156 and owned by the Bhati clan. You'll see a blend of Rajput and Islamic architecture in the fort. Not to mention, you will come across quite a few stalls and shops that sell you carpets and souvenirs here. You can either sign up for a guided tour of the fort or explore it all by yourself. It is one of the most popular tourist places in Jaisalmer.