Fort near Uitermeer. In the 16th century there was a ramp here to defend Weesp. After the construction of the s Gravelandsevaart and the lock, the Uitermeersche Schans became a link in the Oude Hollandse Waterlinie and later the Nieuwe Hollandse Waterlinie and the Defence Line of Amsterdam. .© 20 juni 2019 Aerophoto-Schiphol Aerial Photography