Cramond Island causeway / submarine defense boom

Cramond Island is one of several islands that lie in the Firth of Forth in eastern Scotland, near Edinburgh. As its name implies, it lies off Cramond. It is one third of a mile (0.5 km) long and covers an area of 19 acres, and is currently part of the Dalmeny Estate. Strictly speaking it is not a true island at all, but a tidal island being connected to the mainland at low tide and also by a long causeway. This allows easy access to visitors wishing to cross over. The island lies approximately one mile from the shore.

The line of concrete pylons on one side, constructed as a submarine defence boom in WWII.