The Cincinnati Subway is largely considered haunted by some due to its abandoned nature, underground location, and a local lore that includes chilling tales and claims of paranormal activity from explorers and investigators. While its construction halted in the 1920s due to cost overruns, and it has since served practical, modern purposes, the eeriness of the dark, water-filled tunnels and stations, some of which were converted into fallout shelters, contribute to its haunted reputation. The tunnels have been largely silent and unused for decades, creating an unsettling atmosphere. Being situated underground, the tunnels are dark, isolated, and filled with water and graffiti, which naturally lends itself to spooky stories. The tunnels were built during a turbulent period and were never completed as planned, leaving a sense of unfinished business. Some paranormal investigators and urban explorers claim to have experienced chilling encounters, heard whispers, and seen shadowy figures in the tunnels, according to one YouTube video. Some stories suggest the tunnels were used for illegal activities, including bootlegging and black market operations, adding to the dark history and a potential lingering presence.