We stayed four nights in a great little guesthouse in Cochin called Kapithan Inn. They served us breakfast on the roof, and we were within walking distance of everything - including a Cafe Coffee Day, which we frequented at least once a day. We were really close to the Arabian Sea, and the girls were able to put their feet in the water on one of the first days we were in Cochin.
A couple days later an auto driver took us to a place on the shore where we could see across the bay to the mainland (Cochin is on a peninsula). I was shocked by the garbage in the water, and wasn't anxious to let the girls play in the sea anymore.