Sungrave Tunnels

The Sungrave Tunnels, ancient and foreboding passageways beneath the icy expanse of Mars, emerge in Iron Gold as a clandestine network riddled with howling winds, treacherous ice slicks, and peephole vistas into the stratified caste activities of the frozen society above. These twisting labyrinths serve as vital arteries for covert movement amid escalating Rim-Society conflicts, embodying the saga's themes of hidden undercurrents and precarious survival. Though their full potential unfolds in later books, their introduction marks a pivotal underground realm that shadows the surface upheavals of the Red Rising Saga.