Blingdenstone is not a single cavern, but a network of interconnected caves and pockets the svirfneblin have widened and worked for use as homes, workshops, vending stalls, places of worship, storerooms, and the like. Other than the private homes of svirfneblin families, all chambers are tall enough for Medium creatures to walk around without difficulty, and common areas are even larger.
It is rare for cavern walls to be bare in Blingdenstone. The walls of large caverns are studded with stairs and ramps leading to balconies and hollows serving as storage or shops. The largest caverns are crisscrossed by walkways allowing svirfneblin and visitors to reach connecting tunnels high above the floor.
The caverns of Inner Blingdenstone are brightly lit with a mix of bioluminescent fungi, caged giant fire beetles, and magic. The light from these chambers spills into short connecting tunnels lacking their own illumination, creating areas of dim light. Longer tunnels have their own light, usually magically produced.
Svirfneblin and other Small races can walk through tunnels with ease, but Medium or larger creatures must duck and squeeze — a feature intended to control invaders’ movements. Most tunnels have smooth floors, but those around the periphery of the reclaimed areas are strewn with rubble and debris.