This is a two stage multi cache (used to be 3 stages).
I have lived near the mystic river and lakes for a long time so i know a bit about it. origionally the mystic river was used by ship building companies. over by station landing and essembly mall. the myatic river is 7.0 miles in length and streatches from the mystic lakes and ends up joining with the charles river and flowing into Boston Harbour. It goes through Arlington, Medford, Somerville, Everett, Charlestown, Chelsea, and East Boston. Its name comes from the Wampanoag word "muhs-uhtuq", which means "big river." In an Algonquian language, "Missi-Tuk" means "a great river whose waters are driven by waves"
the river is home to salmon, alewife, blueback herring, striped bass, bluefish, smallmouth bass, largemouth bass, bluegill, carp, and more. Sadly the population in the river has dropped alot bu pollution from mills and careliss people. Another reason the population has dropped is because there are lots of dams over the 7 miles the river covers. luckily the dams have started to have fish ladders so alot of the fish have started to come back.
the Lower Mystic Lake where the final is hidden near is a meromictic lake, which means that the lake has a deep layer of water that never, mixes with its top waters. As a as a result the sediments at the bottom of Lower Mystic Lake accumulate in annual layers (or varves) that have been nearly untouched for a thousand years. The varves in meromictic lakes preserve an historical record sort of like tree rings do. In the case of Lower Mystic Lake, the varves have been used by Mark Besonen and his pals to study the historical incidence of hurricanes.
The Upper Mystic Lake is fed by the Aberjona River, and drains south, over the Mystic Dam, into Lower Mystic Lake, which empties into the Mystic River and then Boston Harbor. So the mystic lake is sort of like a giant river.
Thank you for reading this. If you made it this far i hope you learned somthing.