You see stone floor.
Location
Banuta, Deeper Banuta, Dream Machine, Svargrond Arena, Mount Sternum Undead Cave, The Grave of Goshnar, Pits of Inferno, Inquisition portal room, Hall of the Colossi, Cemetery Quarter Big Building, Magician Quarter, Factory Quarter, Azerus' Room, Yalahar Sewers, Beregar, Talahu Medusa Cave, Lion's Rock, Rookgaard Academy, Rookgaard Temple and some Guildhalls.
Notes
It is a large tile made of stone.