Mountain

The Mountain tile is inaccessible by ground units. There are up to 5 indestructible mountains on the tile.

When generating the map, spaces in close proximity to a Mountain tile have increased Humidity, often covering them in snow.

Unlike the Water tile, the Mountain tile does not help nearby City, Town, Farm and Outpost tiles grow.

Ridge
The Ridge tile is a variant of the Mountain tile. It does not increase the Humidity of nearby spaces.

Damage protection
As each mountain counts as a separate (indestructible) body when calculating damage, mountains provide excellent protection to zeppelins. A full mountain with 5 peaks reduces the chance to hit a zeppelin on that tile with a bombard or shell to 1/6.