Just in time for Halloween, another Algernon Blackwood story. I couldn't find it in the collections posted by Dr. Drib.

From Wikipedia, regarding The Willows: "Perhaps his most celebrated story, was influenced heavily by Blackwood's own trips down the Danube River. It tells the story of two campers who pick the wrong place to sleep for the night, a place where another dimension impinges on our own. H.P. Lovecraft considered this the finest supernatural tale in English literature."