[3] Featuring the Shakespeare Garden, it was listed on the National Register of Historic Places on June 25, 2007, for its significance in landscape architecture.

In 1921, the Union County Park Commission was established and hired the Olmsted Brothers, formed by the sons of landscape architect Frederick Law Olmsted, to design a county park system.

The firm developed a preliminary plan for Cedar Brook Park in 1924, with work on the land and gardens completed by 1930.

It is maintained by the Plainfield Garden Club, with support from the New Jersey Historic Trust.

[4] A walking path connects the various features of the park, including the garden and the man-made lake on the Cedar Brook.