Acheron Lock marks the junction of the River Lethe with the Acheron – also known as the River of Tears. Laced with anti-matter, the sentient lock gates ensure that the water keeps flowing smoothly at all times, in all dimensions, and frequently in defiance of gravity.
Downstream, the Acheron is popular with anglers keen to make an unusual catch. Some scatter oatmeal to attract water horses. Others snare selkies using creels crammed with haggis. More ambitious anglers tempt leviathan sharks by baiting their hooks with oxen or other large ungulates.