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Abney Park cemetery is one of the Magnificent Seven cemeteries in London.
Abney Park in Stoke Newington, is a historic parkland originally laid out in the early 18th century by Lady Mary Abney and Dr. Isaac Watts Link , and the neighbouring Hartopp family.
In 1840 it became a non-denominational garden cemetery, a semi-public park arboretum, and an educational institute, which was widely celebrated as an example of its time. A total of 196,843 burials had taken place there up to the year 2000. It is a Local Nature Reserve.
General William Booth, founder of The Salvation Army is buried here TQ3386 : Abney Park Cemetery - Monument to General William Booth & Catherine Booth.
Wikipedia: Link

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