Abandoned Engineering 10x3 - Enemy at the Gates

In the Scottish capital of Edinburgh, hidden from view, aseries of vaults tell a murky story of opportunity, crime anddestitution; at Fort Schwatka Unalaska are the remains of anAlaskan battleground, where a foreign invader set foot onAmerican soil for the first time since 1812; The Old HerringFactory is a remote Icelandic facility that played a major rolein transforming the nation's economy; and in the calm watersof Croatia's Adriatic Sea, Fort Punta is a vast fortresscharts the rise and fall of a European empire.