Watch the sunlight bouncing off the water as it cascades over Vaidehi Waterfall. Keep an eye out for any rainbows that form in the mist.
You'll have sightseeing choices galore when visiting Coimbatore. Vaidehi Waterfall is an ideal place to start here, but there are plenty of other interesting sights to consider. Marudhamalai Hill Temple, Kovai Kutralam Falls, and Tamil Nadu Agricultural University are near the cascade of water and and will cap off your day nicely.