2120 South Michigan Avenue is located in Chicago, Illinois. It was the legendary home of Chess Records where The Rolling Stones recorded many of their early tracks. The location was so important to them that they created an instrumental with the title and released it on their 1964 album 12 x 5. The place has been turned into a tourist attraction of sorts by the Blues Heaven Foundation, not just a studio but an educational center where everyone can learn about blues and early rock and roll.

Back in the summer of '64, The Rolling Stones spent some time in the Chicago studios of Chess Records and its subsidiary, Checker, laying down tracks for the EP that would become Five By Five. The EP — the second-ever by the band — featured an A-side instrumental track "2120 South Michigan Avenue," the title an homage to the record labels and their studios where the Stones recorded.

Today David Gutowski of the music blog Largehearted Boy tweeted out about a Stones album we'd never heard of: A full LP of 2120 South Michigan Avenue, which was never released. After Five By Five, the Rolling Stones issued the LP 12 x 5 (which also featured the "2120 South Michigan Avenue" track) while the blues-rock gem remained unreleased.