Wander around behind The Bell in Hand and you’ll literally trip over the Boston Stone. The known origins of the 1737 stone are, at best, shaky. A rumor persists that it was used as a surveying instrument to denote the “center” of Boston; this is probably not true. Another that it was used to grind paint pigments, and yet another that it was a tactic created by a local shop owner to generate a curiousity in front of his store. Clearly, we’re still curious. 1 Marshall St. for tea-related exploits. Look for the giant copper kettle hanging above Starbucks in Government Center. It was handcrafted by local coppersmiths Hicks & Badger, and yeah, it actually steams. Can you estimate how much Darjeeling it could hold? Wager a guess and then squint up—its volume is etched on its side. 63 Court St.