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The park was the result of a gift from local cotton manufacturer Thomas Barnes to celebrate the coming of age of his son in 1860, and was formed from part of his estate. The park became the property of Farnworth Local Board in 1864, the Board having been constituted just the previous year, and was opened on 12 October 1864 by William Gladstone, then Chancellor of the Exchequer. It is said that 100,000 people attended the opening.

The design of the park was initially entrusted to William Henderson of Birkenhead, who also designed parks at Blackburn, Oldham and Bolton, but was completed by Robert Galloway who was gardener at Barnes's Birch House. The park was Listed Grade II in 2001.

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