You can drive down Barrack Square, right to the end where there is parking and turning. Or you can walk there from the Martlesham Retail Park and marvel at the telecommunications tower and pay your respects at the memorial to the US airmen who served here when it was an airfield in WW2. Although Barrack Sqaure is a dead end, a path continues alongside the A12 heading eventually towards Waldringfield and Newbourne..however the cache is before the roadway ends. Again the clue is in the title.