With its qualities for nature conservation and local recreation, the Ober-Olmer Forest is an important part of the open space system around Mainz and a prime example of how an area severely damaged by human activity can be reclaimed by nature.

Where in the early 1990s all kinds of American military equipment still cluttered the former training area, where fences, bunkers, and buildings contaminated with asbestos stood, a green oasis now stretches across an area of 350 hectares.
The artist Dörthe Bäumer had a viewing hill built on the former missile launch site. Messages of peace in English, French, Russian, and German are embedded in the steps leading up to this "Hill of Friendship" as a reminder of the Cold War.

Almost nothing remains to remind us of the forest's military use. Fifty-eight buildings were demolished, 13,100 meters of fencing removed, and 50,000 square meters of land unsealed. A new network of paths, around 25 kilometers long, is perfect for hiking, jogging, horse riding, or walking, and also protects the habitats of protected and endangered animals and plants by creating "bypasses." Numerous rare and endangered species on the so-called "Red List," such as orchids and amphibians, have found a habitat here in the protected area. The Ober-Olmer Forest is the largest contiguous forest and recreational area in northern Rheinhessen.

Since 2002, steles have stood here as art objects summarizing the fates of people from Russia, the USA, and Germany during the Cold War who weas art objects summarizing the fates of people from Russia, the USA, and Germany during the Cold War who were connected to each other via the US military base in Ober-Olmer Forest.