There are more famous, grander temples in Kerala, but Ambalappuzha is in a song that almost everybody in Kerala would hum along to if you played it. The town is in the Alapuzha district. The Sri Krishna temple is where the idol of Krishna from the much more famous Guruvayoor Temple was brought for safekeeping in 1789. Extra incentive to visit: the paal payasam (milk pudding/kheer) at the temple is very famous, both for the story behind it and for how awesome it is. If that isn’t enough either, Alapuzha has some extremely nice beaches and the backwaters are right there.