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The Quincy Quarries have supplied granite to Boston and buildings around the world with the tell-tale 'fingers' and bluish color. Now, they are empty and great places to hike or take a walk during the day. Some areas are filled with color by generations of teenagers' graffiti, others are used for rockclimbing, and you can walk down the United States' oldest railroad, an ox-drawn train to transport granite to the harbor for transportation to Boston or further.
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Tours include the Old House and the Birthplaces. To see the historic homes, you must join a tour. The last tour leaves at 3:15PM. Site orientation is also available here, along with exhibits, a bookstore and the site's only public restrooms. The 14 acre (56,600 m²) park is comprised of the Birthplaces of John and John Quincy Adams, the Old House and the United First Parish Church. Reservations are required for groups of 8 or more, however, there is no group rate. You can also see the "Adam's Mansion," home of US President John Adams and his son John Quincy Adams, within a short walking distance of the Quincy Center MBTA (redline) station.
Graves of the Adams and Quincy families and John Hancock's father. Interesting graveyard art. Free.
Excellent overview of Quincy history in lovely stone building built on the site of Hancock's birth.