Hinderdam, River Vecht with on the small tree overgrown island (middle) Fort Hinderdam. On the left on a small island there is another lunette, the lunette on the east side was at the height of the three mansions in front of the fort | 305369

River Vecht near Hinderdam, as early as the 15th century a fortress, sea locks, a retaining and drainage sluice and a dam were built here to protect the city of Utrecht against flooding. After the construction of locks in Muiden around 1674, the locks at Hinderdam were demolished, but the fort was preserved as part of the Old and New Dutch Waterline..© 20 juni 2019 Aerophoto-Schiphol Aerial Photography