Hey Ramadevi, If you are going sometime in 10 days now ... then opt Nandi hills... ..The fogy mornings shouldn't be missed now as the temperature in bangalore is plunging below 10 and nandi hills is the best place to enjoy it ... Happy Travelling!!!
For a short period preferred Nandihi Hills, if you want spend day or two with only hearing breeze than choose Horsley Hills (avoid Summer months), book only government cottages