Rindö redoubt

Rindö redoubt is located in the western part of Rindö island opposite the citadel of Vaxholm. It was erected in 1858-1863 by architect Johann Klein and was intended to protect the Kodyupet strait and the northern part of Vakskholmfjord.
In the picture - view of the mighty buildings from south-west. Infantry obstacles are seen on the foreground.