Ключевые слова: aerial, america, american, architecture, bridge, building, center, drone, harbor, heritage, historic, historical, history, house, ice, industrial, industry, infrastructure, landmark, landscape, ma, massachusetts, merrimack, municipal, natural, nature, old, outdoor, public, river, service, snow, states, structure, tour, tourism, tourist, town, traffic, transport, transportation, travel, tyngsboro, tyngsborough, united, usa, view, village, water, winter,