The Rieterpark is a park in central Zurich, Switzerland. Richard Wagner lived at Villa Wesendonck in Reiterpark from 1849 to 1858 where he worked on Tristan.
Wikipedia https://en.wikipedia.org/wiki/Rieterpark
Address (Unnamed Road), Zürich 8002, Switzerland
Coordinates 47°21'28.708" N 8°31'49.619" E