Sihlwald with obstacles .....

Zürich Wilderness Park (German: Wildnispark Zürich) is a wilderness park near the city of Zürich in Switzerland. It includes the Sihlwald forest, the largest mixed deciduous and coniferous forest in the Swiss Mittelland, and the Langenberg Wildlife Park, the oldest Swiss wildlife park. Both sites are situated in the Sihl Valley to the south of Zürich, but are separated from each other by the town of Langnau am Albis.

Sihlwald is a railway station in the Sihl Valley, and the municipality of Horgen, in the Swiss Canton of Zürich. The station is on the Sihltal line, which is operated by the Sihltal Zürich Uetliberg Bahn (SZU). The station takes its name from the surrounding Sihlwald forest and nature reserve, whose visitor centre is adjacent to the station.