Inchcolm island, in the Firth of Forth has a long history as a defensive position protecting Edinburgh. It was further developed in WW1 and WW2 with gun batteries.
At the eastern end of the island a brick lined tunnel was built through the hill from the protected western side through to the 4-inch battery position on the other side of the hill to permit easy transfer, by tramway, of ammunition from the maagzines in the west. The tunnel was built between 1916-17 by the 576 Cornwall company of the Royal Engineers and has an ornate eastern portal.
The tunnel remains in good condition and visitors to the island can access it. Regular boat trips take place in summer months,primarily to visit the well-preserved abbey on the island.
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