Diamond City is the first track of the Wario Cup is Mario Kart Arcade GP.
The track starts out in the middle of the city. The player then passes through a techno-themed tunnel that takes them on a U-Turn. After this, the player will cross onto a bridge, that takes them into another tunnel that takes them onto a half turn. Once out of the tunnel, the player enters onto a free-way type bridge, that takes them through the Wario Tunnel. The player then goes on a U-Turn, and passes the finish line.