"The Broomway is 'allegedly ‘the deadliest’ path in Britain,' . . . 'and certainly the unearthliest path I have ever walked'"

BldgBlog:

It only exists at low tide, for starters, and it can often be followed only with the visual help of unstable wooden poles driven into the ground to mark its route across the landscape. Its unusual name, in fact, comes from “the 400 or so ‘brooms’ that were formerly placed at intervals of between thirty and sixty yards on either side of the track, thereby indicating the safe passage on the hard sand that lay between them.”

Without those brooms, the path—and not just where it’s heading, but the route you’ve already walked to get there–would disappear from view entirely, in effect stranding you at sea.