The innovative Northala Fields, which features four conical mounded landforms, has been created by LDA Design in conjunction with Ealing Borough Council.
Situated alongside the A40 in west London, the landforms rise from the ground in a spectacular roadside vista.
The £5.5m project was funded through the importation of inert waste onto the site to create the new landform.
Early concept designs were developed by Form Associates director Peter Fink and aimed to create a major piece of land art, as well as reducing adverse effects from the adjacent road, such as noise, visual and air pollution.
This was followed by detailed proposals from LDA Design and the park was officially opened on Monday (22 September).
The aim of the project was to create ecological opportunities through new topography and soils.
LDA Design worked closely with contractor CJ Pryor, which completed much of the earth-moving, and further landscaping was carried out by CR Swift Landscaping.
CR Swift business development manager Steve McMillan has been involved in the work, which included seeding, creating gabion baskets and maintenance. He said: "This was a pioneering project and has been quite exciting for us."
The park includes a path network for walking and cycling, a fishing facility, pool, outdoor amphitheatre, new woodland habitats, meadowlands and grasslands.