I recently released a 24 track instrumental album titled "Traveling man". Each song was produced in the city the track was named after. My idea was to produce based of the influence I got from each city.
My homie yU (1/3rd of the Diamond District) kicked an ill 16 bars over the "New York City" instrumental.
You can listen to the entire album on my bandcamp page and also download yU's "yU Traveling" as a free bonus.
While you're at it, preview the entire "Traveling Man" album before you buy it!