The remains of the Castle can be visited
Bernegg Castle (Ruin) (Hinwil)

Northeast of Hinwil in the canton of Zurich, Switzerland, lies the Bernegg ruin, a former hilltop castle. It is an example of the clearance castles of the 12th and 13th centuries in the region, which never achieved supra-regional historical significance.
History+
Bernegg Castle, whose construction is presumed to be around the 13th century, was first documented in 1229, when the Lords of Bernegg were first mentioned. This noble family served the St. Gallen Monastery and the Counts of Rapperswil and maintained close ties with the Lords of Landenberg. However, the economic basis of the small dominion proved insufficient, and from the last third of the 13th century, more and more properties had to be sold. As early as 1277, part of the property passed to the Bubikon Commandery of the Knights Hospitaller.
Source: Wikipedia · Licence: CC BY-SA 4.0
This description draws on the facts documented in the linked Wikipedia article; Wikipedia content is licensed under CC BY-SA 4.0. Wording and editing: Mobile History.
Location: 47.3088, 8.8663