The remains of the Castle can be visited
Haag Castle (Ruin)

The Haag Ruin, once a moated castle, stands on a hill in the market town of Haag in Upper Bavaria. Of the original complex, the residential tower is still visible from afar today and characterizes the townscape. It tells the story of a county that played an important role in the region for centuries.
History+
The origins of Haag Castle likely date back to the 12th century, when it was built by the noblemen "de Haga" or "vom Hage". Ownership changed, first to the noblemen Gurren von Kirchdorf, who subsequently called themselves Gurren von Haag. Later, the rule passed to the ministerial family of Fraunberger, who held the castle until 1566. With the secularization around 1804, the gradual demolition of the complex began, bringing it to its current state.
Location+
The Haag Ruin is located in the market town of Haag in the district of Mühldorf am Inn, in the state of Bavaria, Germany. It is situated at an elevation of approximately 553 m above sea level.
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: 48.1600, 12.1813