Undertow Spillway

Undertow Spillway is a multiplayer stage in. It is an abandoned underground flood bypass in Splatsville that was renovated into a Turf War stage.

Quotes
"Undertow Spillway is a former flood bypass located deep under Splatsville. Abandoned for years, it surged in popularity after it was renovated into a stage for Turf War batlles!"

- @NintendoEurope on Twitter