Talk:Buildings/@comment-68.103.169.45-20201004175117/@comment-71.38.13.194-20210104164417

The watchtower is just the building that sounds the alarm any time a building is being attacked. You've had it since day 1. The Underground Tunnel is currently still not in use (01/04/21) even once you unlock the zone. It will be used in a future expanshion / game update.