Parramatta Regional Park is a significant historical site. It contains evidence of Aboriginal occupation and colonial settlement. It was originally known as the "Governor's Domain" from 1788 when it was established until 1857, when it became a public park.
The park contains 2 of Australia's oldest buildings - the Old Government House and the Governor's Dairy.
Governor Macquarie had The Bath House west of Old Government House constructed in 1823. When in operation it was a sunken bath that had it’s water pumped from Parramatta river and was surrounded by suite rooms. The building was converted to a pavilion in 1886 after it had been vandalised by the public.
Parramatta Regional Park is the largest area of open space where visitors can enjoy a range of recreational activities along the banks of Parramatta River or
its fields, cycleways and facilities such as, picnicking, walking, cycling, field sports or just exploring the historical monuments and buildings throughout the Park. Annual festival and events are celebrated here also.