This is a large, more modern market near the recommended hotels that is a great shopping destination. A few stores to check out: Fab India, Pernia's PopUp, Good Earth, Ogaan, ANOKHI
The best restaurant if you're feeling adventurous - in the middle of Chandi Chowk, one of the oldest and busiest markets. Has great Mughali chicken tandoor.
Humayun's Tomb is a cultural UNESCO World Heritage site, built in the 1560's for the Mughal Emperor Humayan.
Another UNESCO heritage site that was once the main residence of the Mughal emperors. Note that it isn't open on Mondays!
Our favorite outdoor park in Delhi - great for a serene morning walk if you'd like to combat jet-lag outside