Under the B&M October 8, 2015October 7, 2015Benn Craig A short tunnel under what once was the Boston and Maine rail line that now carries the Minuteman Bikeway over a connection between Spy Pond field and Whittemore Street. October 04, 2015. Share this: Click to share on Facebook (Opens in new window) Facebook Click to share on X (Opens in new window) X Click to share on Reddit (Opens in new window) Reddit Click to share on Tumblr (Opens in new window) Tumblr Like Loading... Related