Kerala has both beaches and mountains Depending on what you like more you can go to Varkala and check out the beaches over there, they mostly have sea food but if you are into sea food it could be great... Varkala cliff has this long stretch of path going along side the beach... very pretty Munnar is fun too its mostly tea/coffee estates but its very pretty and there are some waterfalls near by and town is decent only Time wise don't go in rainy season December could be peace but do check out the corono scene as there could be lockdowns