There are many local points to see in Bangalore like ISKCON temple, Nandi bull, Assembly hall, Banargatta zoo, Vishweshwara Museum, HAL museum etc… But all these are OK. Plan one extra day to stay Bangalore and visit Hogenakkal falls. This can be really a memorable one day picnic from Bangalore.
It is 150 KMs from Bangalore. You can hire a taxi for a day and can follow following route to reach the destination.
Route : -Bangalore-Bannerghatta-Jigani-Attibele-Hosur-Krishnagiri-Dharampuri-Hogenakkal
Then started the collection part. First at entrance you shelled out Rs.20 as entry fee into hogenakal, then entry into book of forest range Rs.10 (for forest guard, you feel it is bribe), then after entering Hogenakkal, parking fee Rs.20. This parking fee is for parking on roads. Then again a parking fee of Rs.15 in TNTDC compound. Again fee for ride in coracle Rs.15 to be paid to some agent. But you’ll give a receipt. This is for the charges of coracle. Then you have to negotiate with coracle. The rate can be fixing