Hey Rhea, Places for one day picnic from Mumbai : 1) Lonavala 2)Essel world 3)Alibaug 4)Malshej 5)Elephanta Island 6)Matheran 7)Khandala 8)Kashid 9)Kamshet For more places with brief details go through this link :
https://www.tripoto.com/trip/best-picnic-spots-near-mumbai For the 3D/2N trip from Mumbai : 1)Gokarna 2)Goa 3)Pune 4)Ahmedabad 5)Mahabaleshwar 6)Alibaug Happy travelling!!!!!