In 1996 the Kößlbachtal area, covering a total of 32 hectares, was declared a nature preserve by the provincial government of Upper Austria.
The entire valley is covered with trees and only a small part belongs to the Nature Preserve. All the rest is still cultivated by its owners, the local farmers. It is a truly unique place to relax and unwind, to make endless walks or to collect berries, mushrooms and flowers. Kößlbach brook marks the border between the towns of Engelhartszell, Waldkirchen and St. Aegidi. The minor Kößlbachtal valley offers a varied fauna and flora as well as countless buildings rich in history.