Olavsvern
Outside the Norwegian city of Tromsø is this decommissioned base of the Royal Norwegian Navy. It is a large complex hiding in a mountain. It comes with a submarine hanger made with rock as well as direct access to the sea. The government reached the decision to close it in 2008 after the navy was restructured. Moreover, they actually put it on the market in 2011. They eventually gave it to an oil rig firm for the price of $4.3 million or 38 million kroner. However, reports say there is Russian military activity happening down there.
Olavsvern
The Maginot Line, France
The French Government built a series of fortifications in the 1930s – The Maginot Line. It ran along the border with Germany and its main purpose was to stall a possible German invasion. It meant to allow the French mobilize their own armies while holding back enemy forces. While it was a good idea, in theory, it wasn’t too effective when push came to shove. The Germans invaded from a direction the French hadn’t anticipated and conquered France in six weeks in 1941. Not to mention that the Maginot Line was too expensive to maintain, let alone during a war. To this day, the Maginot Line still exists, but it isn’t maintained or in use anymore.
The Maginot Line
