A little piece of Minnesota music history just hit the real estate market — Pachyderm Studio in Cannon Falls is now for sale. Nirvana’s “Heart Shaped Box” or Soul Asylum’s “Runaway Train” are just a couple of the famous tunes recorded at Pachyderm since it opened in 1988; another fun fact: local favorite Haley Bonar may have been among the last to record at Pachyderm, in 2006.