Pavana/ Pawana Dam is about 45 mins drive from Lonavala. Since we were already based in Lonavala it served as an ideal place to spend time.
The drive as expected is entirely through hilly narrow one lane roads, so just be careful. Nevertheless the scenery is quite picturesque green especially since we were going at end of monsoon.
The main attraction here is the boating in the lake. View from the parking lot:

There's a garden near the boating club. It also houses a cafeteria which was a relief considering the hot sun.