Various locations, Information, (617) 547-4252
Every spring, CHS offers 90-minute walking tours through many different neighborhoods of this large city, including the working-class streets of East Cambridge, the snooty estates of Brattle Street, and the patrician homes of North Cambridge. Most tours are $3, and they take place rain or shine.
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This is a shallow kelp-covered plateau with a 2-3 metre steep rock slope at the edge that levels out onto sand. From this point it curves out in a northerly direction for 30 metres or so and then turns south and round East Wideopen. There is very little of interest and only 4 or 5 metres at the deepest point, but at low water makes an ideal sheltered first open water site. Whittingham Bus or Newbiggin Bush This is a small bus’, bush’ or reef that is covered in kelp and other species of seaweed. The top of the bus dries on a low spring tide, but underwater and nearer the seabed there are lots of overhanging ledges and crevices that shelter numerous forms of marine life. However, once the flooding tide runs over The Bridges (the shingle ridge that connects Knoxes and West Wideopen) it is almost impossible to remain in one place. The centre of the bay inside Knoxes Reef is mostly sandy bottom but at the western end and about 50 metres east of The Bridges is an area of undulating little reefs, covered in dense kelp and tangleweed, sometimes so thick it is difficult to push your way through. This is another ideal site for the novice as it is safe, shallow and with no current at all at low water, and there is always the possibility of catching a nice crustacean for lunch. Moving east and seaward, the kelp forest disappears and gives way to sandy seabed. Digging by hand into the sand can produce some nice juicy razor-fish and edible Venerupis clams that live just beneath the surface, although you have to be extremely quick to catch the razor-fish which burrow down into the sand like lightning.