Secret underground system built by Germany in the Alps toward the end of WWII.
HistoryMilitaryArchitectureWorld War Two
Current best complexity is 7:
Alpine Fortress can be discovered in Concepts, categorized under History, Military, Architecture, World War Two. Secret underground system built by Germany in the Alps toward the end of WWII.
It has been discovered by 4 boards and crafted 5 times, first appearing 4 months ago. Alpine Fortress can be created from 4 recipes, and goes on to appear as an ingredient in 2 others.
Alpine Fortress was first discovered by VoidKnihgt 4 months ago. The lowest-complexity recipe (7) is held by secret.
Related concepts worth exploring include Skyline, Wall, Fountain, Ice Age, Marine, Skyscraper, and 6 more.