Tung is located around 30 Kms from Lonavala. From Pune-Mumbai expressway, you need to take Lonavala exit and continue towards the Amby Valley. Just before the Amby Valley, take a left turn to reach Tung Village. Tung village is very small but its location is excellent as Tung fort, Pavana water lake are very close and you can view some other forts like Lohgad & Visapur. Tung fort was built in 1600 CE by Adil Shah but later captured by Chatrapati Shivaji Maharaj.
We stayed in Club Mahindra resort at Tung. The resort is beautiful with huge area. It has 2-3 swimming pools with one infinity pool, from which you can directly view Pavana lake below.
You can do small treks from the resort. They have excellent facilities for various sports, Spa, etc. If you are interested in bird watching, you can see some beautiful birds like Sunbird, Magpie-robin, Bulbul, Shirke, etc. We did a small trek from resort to Pavana lake. The trek can be done in 2 hours but it is very steep. The best part of the trip was Moonlight dinner with a spectacular view of Pavan lake.