Visit rock garden,sukhna lake
There is also a cactus and succulents botanical garden must visit if you love plants..also you can visit rose garden if you like.
To escape the summer hear Must go to ELANTE MALL..you can spend you whole day there it’s so big..the food court is also good where you can enjoy chole bhature etc.
If you like street shopping you can visit sec 22 market-it’s a open market with variety of products at very reasonable price just bargain!
At night if you feel hunger you can walk to Aroma-a small food court kind of and it opens till 2am..try staying preferably near tribune chowk