Scorching maze of the chosenFire walk of fortitudeRails of precarious decisionSearing spirit of ruin —Floor descriptions, Molten Caves The Molten Caves are the third stratum in Etrian Odyssey III: The Drowned City. These volcanic caves contain basalt flows and heated tiles, requiring extra caution to navigate. Despite the high temperatures, curious glowing yellow shrubs grow along the walls and magma chambers, and many fierce creatures call the extreme environment home.