The map contains many destructible wall sections with health — when walls reach 0 health, the mesh changes (to destroyed rocks/pebbles) and monsters can freely travel through them. Walls can still be repaired after being destroyed.
Walls appear increasingly damaged (using different textures based on health %) rather than displaying a health bar.
Walls are initially in the destroyed state (players have to build up the walls using stone — some players may choose to focus on defenses, shrine gold, armor iron, etc. early game).
Each major wall has gates that can be opened or closed from the inside by humans, but with a long cast time. If the gate is left open for a long time, players will be able to retreat quickly but monsters will be able to access the shrine significantly faster. Gates have very high health but cannot be rebuilt like walls.