Circus Park is one of the most distinguished green areas of Bucharest, being a veritable urban landscape resource. Measuring 17 ha of land, it was designed during 1960-1961 following the plans of the architect Valentin Donose, who formed and coordinated an interdisciplinary team within the Bucharest Project Institute, responsible with designing green areas much needed to the capital at the time. This document aims to analyse the essential components which form a park and bestow the attribute of an urban landscape resource: vegetation, water, alleys and ornamental furniture. Circus park is the quintessential example which points to the idea that, just as man is attracted to water, he is also instinctively attracted to trees and the spaces they compose. The distribution of foliage items contained in this study cover a wide spectrum of trees, shrubs, lianas and herbaceous plants which range from wild to natural or man- made architectural shapes. This inquiry recommends maintaining the concepts found in the initial plan of the park and taking the necessary measures to preserve this natural heritage of Bucharest.