A must visit place in shimla. This building was built by britishers. There is an entry fee and you can visit the building and the park nearby it.
3 - The Ridge and Mall road
Ridge is at the mall road of shimla. you can shop, dine and roam. It has amazing night life. Jakhu temple is nearby ridge only.
Day 3: Back to kalka and then to Delhi
If you have time then you can go to Pinjore garden in Kalka. Its 5-6kms from kalka railway station.
1-Road trips are little bit tiring. Take proper medicines if having travelling sickness.
2-Most of the shops and taxi in kasauli & Shimla accept cash only.
Enjoy the trip.