A narrow corridor, paved with quadrangular bricks, leads to the first room of the “frigidarium” of the Oriental Baths known as the Room of the Nereids. The name comes from the mosaic composed of large white and green tiles of various shades that depicts a marine “thiasos“. The scene features four Nereids sitting atop a lion, a bull, a horse and a tiger, all characterized by the typical tail of sea monsters ending with three fins. On the northern side of this room there is a large rectangular tank with a hole on the back wall, for the insertion of the water supply pipe. On the walls lined with hydraulic mortar, you can still spot the mark left by the water level. Adjacent to the pool, there is a smaller space, with a counter dug along the western side, which could represent a latrine.