In 1833 the first free public library in the United States was established in Peterborough, New Hampshire.
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Wallace D. Lovell built the Hampton River Bridge in New Hampshire in 1900 and called it the "mile-long bridge". It was reputed to be the longest wooden bridge in the world.
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America's Stonehenge is a 4000 year old megalithic (stone constructed) site located on Mystery Hill in Salem, New Hampshire and presently serves as a leisurely, educational tour for the whole family.