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One of the last narrow canals to be built the canal was approved by Act of Parliament in April 1826. Thomas Telford surveyed the canal and construction was engineered by William Crosley. The completed canal was opened on 9th November 1831 at a cost of £320,000.00. The canal was bought out by the Manchester, Sheffield & Lincoln Railway in 1847. With nationalisation in 1947 it passed to the Docks & Inland Waterways Board with commercial carrying finishing only in the 1960's shortly before British Waterways was formed. The canal runs from Marple Junction with the Peak Forest Canal in the north 26¼ miles to the stop lock at Hall Green near Kidsgrove. The canal is noted for its six fine change or snake bridges where the tow-path changes sides of the canal. These bridges were designed to allow the horse to move over without having to untie it from the boat. Thanks to Telford's design for commercial traffic the Macclesfield Canal has a very shallow and tapered bottom. The deep channel is just wide enough for two boats to pass in the centre making mooring other than at wharves 'challenging'.

Listed buildings and structures are officially designated as being of special architectural, historical or cultural significance. There are over half a million listed structures in the United Kingdom, covered by around 375,000 listings.
Listed status is more commonly associated with buildings or groups of buildings, however it can cover many other structures, including bridges, headstones, steps, ponds, monuments, walls, phone boxes, wrecks, parks, and heritage sites, and in more recent times a road crossing (Abbey Road) and graffiti art (Banksy 'Spy-booth') have been included.

In England and Wales there are three main listing designations;
Grade I (2.5%) - exceptional interest, sometimes considered to be internationally important.
Grade II* (5.5%) - particularly important buildings of more than special interest.
Grade II (92%) - nationally important and of special interest.

There are also locally listed structures (at the discretion of local authorities) using A, B and C designations.

In Scotland three classifications are also used but the criteria are different. There are around 47,500 Listed buildings.
Category A (8%)- generally equivalent to Grade I and II* in England and Wales
Category B (51%)- this appears generally to cover the ground of Grade II, recognising national importance.
Category C (41%)- buildings of local importance, probably with some overlap with English Grade II.

In Northern Ireland the criteria are similar to Scotland, but the classifications are:
Grade A (2.3%)
Grade B+ (4.7%)
Grade B (93%)

Read more at Wikipedia Link