Anfield and Highbury are both old-school stadiums penned in by residential neighbourhoods so that you wouldn't know you were near them until you turn the last corner of the nearest block.
Arsenal's ground has the famed Marble Halls but they turn out to be amazingly small. Basically a front hallway with sweeping staircases on either side, the focal point of the halls is the black, sculpted bust of legendary manager Herbert Chapman.
The marble halls will be preserved as a protected structure in the housing development that goes up when Arsenal move a few hundred yards away to their Ashburton Grove ground. Emirates Stadium is still under construction but most of the exterior is visible from outside the construction site and a majestic spaceship of a structure it is.
When complete it could rival Old Trafford for spectacular first impressions from afar if not in capacity (60,000, a significant upgrade on Highbury's 38,500).
Anfield is a repository of great history with its Bill Shankly statue, the 'This Is Anfield' sign in the players' tunnel, the trophy cabinet full of European Cups, a mosaic tribute to the victims of the Hillsborough tragedy and the all-seated space where the Kop used to be.
The club museum rivals United's for spine-tingling moments, especially in a recreation of the old Kop using a wall-size video screen to show a black and white BBC film of the famous terrace in its heyday replete with full volume sound.