Underground Cavern Map

An underground cavern system map drawn in top-down cross-section view, a network of tunnels branching from a central cavern, the main cavern large and irregular with a subterranean river flowing through it drawn in pale blue with a ripple pattern, a waterfall dropping from a higher passage on the east side drawn as parallel blue lines, a cluster of stalactites marked as small triangles hanging from the cavern ceiling in the north chamber, a narrow passage to the south leading to a smaller dry chamber with drawn crystal formations as small geometric gems, a pit in the centre drawn as a dark circle with a depth-marking cross-hatch, three tiny drawn mine-cart rails as parallel lines leading from a tunnel entrance at the top, a small blank rectangular area in the main cavern for a label, no text, no letters, no room names, hand-drawn cartography style with ink linework on aged grey parchment Art direction controls: soft directional studio light, golden hour, quiet and editorial.