Hello Seema Ma'am!
There are many beautiful places around Mumbai. All the places and holiday destinations mentioned are within 100-500 KM range from the city center and these destinations are considered the perfect place for a 5-6 days holiday with family and friends. 1. Karjat
2. Lonavala / Khandala
9. Malshej Ghat
11. Murud Janjira
Check out Bhandardara, dist. Ahmednagar. It's an amazingly beautiful place. There's mountains all around. Bhandardara is situated in the midst of Sahyadri range. You must visit this place once at least. Check out The Land Of Wanderlust (TLOW) website..... https://thelandofwanderlust.com/