Damp Castle, Manor house in Damp, Germany.

Gut Damp is a moated manor near Hegnholt between Damp and Fuglsang-Grønholt on the Svansø peninsula. Its core is a rectangular central building of 1595–1597 with a pavilion at each corner; the western pavilions were joined into a wing during construction, the eastern ones only in 1720, when a further west wing was added. The gatehouse, barns and stables have oak half-timbering infilled with brick and thatched roofs.

Originally constructed as a noble residence several centuries ago, Damp Castle served as both an aristocratic estate and administrative center, maintaining its residential function through successive generations of influential local families.

The name Damp comes from an old word for falling water, referring to the nearby Bökenau stream. The great hall, with its gallery, organ and stucco ceiling of female musicians, is still used for concerts and festivities. The estate also appeared in the television series Onkel Bräsig and Der Landarzt.

The estate lies near Hegnholt, midway between Damp and Fuglsang-Grønholt on the Svansø peninsula, in Damp municipality, Rendsburg-Eckernförde district. The manor is ringed by a moat crossed by two bridges, so the farmyard is reached separately from the main house. The gatehouse stands at the south side of the yard, with barns and stables grouped around it. The former New Cow House now holds a restaurant.

The estate features a historic water moat that still encircles the main building, originally designed for medieval defensive purposes but now serving primarily as an aesthetic and historical preservation element.