In the morning, explore the Gateway of India and click some Instagram-worthy photos. In the afternoon, visit the Elephanta Caves, a UNESCO World Heritage Site. Take a ferry from the Gateway of India to the caves. In the evening, head over to Marine Drive and enjoy the sunset with snacks and drinks.
Start the day with a visit to the Aga Khan Palace, a national monument and a symbol of Indian freedom movement. In the afternoon, take a tour of the Osho Ashram or indulge in some retail therapy at the Phoenix Marketcity Mall. In the evening, head over to the 1 Lounge and Restaurant for some drinks and dinner.
Start the day with a trek to Lohagad Fort and enjoy the scenic views. In the afternoon, visit the Karla Caves, a complex of ancient Buddhist Indian rock-cut caves. In the evening, relax at the Wet N Joy Water Park or take a stroll at the Lonavala Lake.
Start the day with a visit to the Sula Vineyards and indulge in some wine-tasting. In the afternoon, visit the Trimbakeshwar Temple, a famous Hindu temple known for its Jyotirlinga and Kumbh Mela. In the evening, head over to the Someshwar Waterfall and enjoy a natural waterfall amidst the lush greenery.
Don't miss out on exploring the street food of Mumbai. You could also take a day trip to the hill station of Mahabaleshwar from Pune. If you have some extra time, make a visit to the Ajanta and Ellora Caves, a UNESCO World Heritage Site, from Nashik. For maximizing fun, organize a camping trip at Pawna Lake or enjoy a hot-air balloon ride over the scenic Sahyadri mountains.