Saint John is a city located on the southern coast of New Brunswick, Canada. It is known for its rich history, being one of the oldest cities in North America, founded in 1604. The city is situated at the mouth of the Saint John River and is famous for its unique reversing rapids, where the river flows backward due to tidal forces. The economy of Saint John is diverse, with key industries including shipbuilding, oil refining, and tourism. The city features several cultural attractions, such as the New Brunswick Museum and the historic City Market, which showcases local products and crafts.