In the morning, visit the Vaitarna Dam, which is the main source of water supply in Mumbai. You can take a walk on the dam and enjoy the scenic beauty of the lake. In the afternoon, you can have a picnic by the lake and enjoy the view. In the evening, you can watch the sunset and take a boat ride on the lake.
In the morning, start your day early and go for a trek to Kalsubai Peak, which is the highest peak in Maharashtra. The trek is difficult, but the view from the top is worth it. In the afternoon, you can have lunch at a local restaurant and try the traditional Maharashtrian cuisine. In the evening, relax and unwind at your hotel or visit a nearby spa.
Other attractions you can consider visiting include Tringalwadi Fort, Bhatsa River Valley, and Amruteshwar Temple. For a side trip, you can visit Nashik, which is famous for its vineyards and wineries. To maximize your fun, make sure to carry a camera, wear comfortable shoes for trekking, and carry sunscreen.