A bridge flies north and south, and the sky changes. The rainbow bridge across the Niagara River connects the United States and Canada. The center of the bridge is accompanied by three flags, the maple leaf flag on the north side, the star-striped flag on the south side, and the United Nations flag in the middle. The shape of the bridge is like a rainbow. The center of the bridge can overlook the frontal panoramic view of the waterfall. The river under the bridge can often show a beautiful rainbow~