Many older stadiums have corners that do not line up, stands of different heights and gaps that appear inexplicable. The cause is incremental development on a constrained site.
Grounds grew one stand at a time
Clubs rarely had the money to rebuild an entire stadium, so stands were replaced individually as funds allowed, sometimes decades apart.
Each new stand was designed to current standards and to the maximum size the site and budget permitted at that moment.
The result is a bowl assembled from pieces that were never intended to meet, and the corners are where the mismatch becomes visible. A stand from one era sits beside one built to entirely different assumptions about capacity and comfort.
The site sets the boundaries
Urban grounds are hemmed in by streets, railways and housing that predate them, and those boundaries cannot be moved.
A stand pushed up against a boundary on one side cannot be matched on the opposite side, so the bowl becomes asymmetric by necessity.
Corners suffer most, because they are where two constraints meet and neither can be relaxed to accommodate the other. The space left over is frequently too small to seat and too awkward to use for anything else.
Why the gaps are sometimes left open
Filling a corner requires the adjoining stands to have compatible geometry, and stands built to different rakes cannot simply be joined.
An open corner also provides an emergency exit route and lets air and light reach the pitch, both of which have real value.
Some clubs retain the gap deliberately even when they could close it, because the ventilation benefit for the grass outweighs a modest number of seats.
The cost of an uneven bowl
Uneven heights create wind patterns inside the ground, and a stadium open at one corner can funnel air across the pitch in a way a closed bowl does not.
Acoustics suffer too, since sound escapes through the gaps instead of reflecting back, and the atmosphere feels thinner than the attendance suggests.
Corners also tend to hold the worst seats, because the sightline geometry was calculated for the stands rather than for the junction between them.
Why full rebuilds are rare
Rebuilding a stadium entirely means playing elsewhere for a period, which costs revenue and risks losing supporters who do not return.
Staying on site and rebuilding around a working ground extends the programme considerably and constrains what can be built at each stage.
The awkward geometry of an old ground is therefore a record of those decisions, and it is usually cheaper to live with than to correct.
