Cramond Island is a tidal island about one mile out to sea, which is connected to the mainland at low tide across the Drum Sands. This causeway runs at the foot of a row of concrete pylons on one side of the causeway, which were constructed as a submarine defence boom during the Second World War and are one of the most striking sights in the area.
At high tide the path is covered by several feet of seawater which cuts the island off from the mainland.
It is safe to walk along the raised causeway to the island at low tide, but only if visitors ensure that they leave enough time to return to the mainland before the water rises.
The speed at which the tide comes in can easily trap the unwary. A large signpost (located at the start of the causeway) warns visitors of the danger. If this warning is ignored, there can be serious accidents or people may be stranded on the island until the next low tide.
Coastguards recommend that the crossing is only attempted during the two hours either side of low water.
In 2011, a Daniel Defoe of Livingston, West Lothian and an unidentified female found themselves trapped on the island due to miscalculating the times of the tide. This story gained the attention due to the ironic parallels with Robinson Crusoe; a novel written by the 17th century writer Daniel Defoe