|From:||North St Andrew Street (NT255741)|
|To:||South St Andrew Street (NT255740)|
|Via:||St Andrew Square|
|Distance:||0.3 miles (0.5 km)|
|Meets:||ZC24, ZC21, ZC24|
|Route outline (key)|
The ZC23 is listed as comprising St Andrew Square in Edinburgh's New Town. However, it only appears to include the north, west and south sides of the square, as the east side is part of the ZC24, which also includes the north and south parts of St Andrew Street. In the middle of the west side of the square, the ZC21, George Street, also joins.