Location. Rainbow Cruises is located in Alappuzha, close to Alappuzha Beach. Regional points of interest also include Vembanad Lake & Kumarakom Boat Jetty. Property Features. Rainbow Cruises features a library & tour/ticket assistance. Room service is available. Guestrooms. All rooms include separate living rooms. At this 3 star houseboat, accommodations include kitchens with coffee/tea makers.