Literally “old fort“, Purana Quila is definitely worth including in your itinerary. Built by Mughal emperor Humayun and Afghan ruler Sher Shah, the walls of the fort have three gates and are surrounded by a moat fed by the river Yamuna. The wall was built by Humayun while the buildings in the fort are attributed to Sher Shah. The notable buildings that have survived in the fort are the Sher Mandal and the Quila-I-kholina Mosque. Purana Quila is also the venue for a spectacular sound and light show held every evening.