Niagara Falls has a distinct sense of distance and near-sighting. First, we can see the Falls from the watchtower up to more than 100 meters, then we can get close contact with the Falls by the Mist Maiden cruise ship. Finally, we can see the Falls from the observation platform on the ground. Only when we are in the scene, can we really feel the charm of flying straight down 3,000 feet, and the idea of returning cruise ship. Outside, a double rainbow appeared on the water.