Yes, you can visit the Nagalapuram Falls, which is safe to explore during the monsoons because the water is calm and flows steadily. However, the place has no proper security as it is located in the forest away from any locality.
We recommend that you travel in a group because there are instances of people consuming alcohol around here.
If you are a couple, it is not a safe place unless you are in a big group. A few miscreants steal petrol or eve-tease women.