Shivanasamudram is the location of a HydroElectric project, but more pertinently it is also home to a few lovely water falls. It is located in Karnataka.
The two falls are really majestic in the monsoon season.
Route is Bangalore - kanakpura -malvalli - Shivasamudram (Approx 120 km) Take the Kanakpura road and drive peacefully till Kanakpura, traffic is slight compared to the other route and this route should be ideal for bikers. After Kanakpura there is a fork in road where left branch goes to Chunchi Falls, you need to take the straight branch (ask someone for direction to Malvalli). Drive through Malvalli is scenic with lush green paddy fields on both side.. (Young/new paddy shoots are the greenest-green you would see in nature.) Anyway take left after Malvalli, you would be reaching the falls in 20 kms or so...
Alternate Route : You can also drive along Mysore road till Maddur and take a left from there towards Malvalli and keep going straight till Shivanasamudram. A bit longer route though road condition would be much better (but you will find lot more traffic as well.)
There are 2 falls about 2 km apart, the first one (Bhara Chukki I guess) has also got a Dargah near it. I was able to have a splash in the next fall (I think that one was Gagana Chukki) If the conditions are right (not too much water) then you can walk/trek all the way down to the falls and have a nice swim. Locate a nice shallow area and wade in...
It would be a good idea to pack your lunch and water as not much is available apart from warm softdrinks.
BE CAREFUL IN SELECTING A SAFE PLACE AS THERE ARE NO LIFEGUARDS AROUND!!