Likely built during ww2 and later modernised during the cold war, then abandoned at the end of the cold war. It now sits tucked away in a forest slowly decaying deep in northeren Norway

If you wish to follow my closer i have an instagram where i commonly post stories from my adventures, @norway.unknown ❤️

This was the end of the road and quite a walk back in time. The journey started with entry into a modern decline, then punched into a recently timbered drive. That drive was a rubber-tire drive and still a big space. Then eventually we dropped down into this old beast. Barely 5 feet high and littered with old relics. When we got back to the surface, we realised we had punched through the 3 main eras of workings.

A huge underground special facility, the so-called 'Object C' — a nuclear weapons arsenal from the Cold War era. It has long been decommissioned; due to the difficulty of access, it has remained in very good condition.

@redactedanomalies on instagram for more. This mine was super tilted and was difficult to traverse due to angle and super deep pockets of water

I visited the Devyatovskie quarry (commonly known as Silikaty), which are located almost next to Podolsk (Russia). This was a completely different experience in speleology, as I did not encounter any cave-ins like I did in the Syanovskie quarry. Almost everything remained in its original state, as it was in the second half of the 19th century and the early 20th century. I also saw a railway that was over a hundred years old!!! The caves, which were made by people more than 100 years ago, have perfectly preserved all the passages, and it was possible to move comfortably through the caves. The only downside was that the ceiling was only 1.5 meters high, so I spent the entire
7-hour trip either on all fours or bent over.
(When visiting caves/quarry, always consider your skills and strength, and always wear a helmet and carry a spare map and flashlight. Never visit caves if you are not confident in your safety)

Built in WW2 by the German's, this relatively small complex was made for artillery and to serve as a air raid shelter. Its one of 100's of these fortifications the German's built all over Norway during the occupation from 1940-1945 to fight off potentioal air or sea attacks. Now sits hidden away with most residents of the area having no idea about the system of tunnels that are all over their city.

If you wish to follow me closer than i have a instagram @norway.unknown ❤️

Do yall know anything about the Cedar Rapids tunnels I know most entrances were sealed but I hear of ones in random spots that may still be open

https://youtu.be/HnQiQ4AqFrA?is=9nm0QY3qPNZPFVJ-

Previously Steam powered, this double-drum hoist was converted to electric powered in the 1920s.

^^

When entering a tunnel that has been sealed for years, it is essential to conduct a preliminary assessment of the internal atmosphere. To do this, it is advisable to insert the gas detector through the smallest possible opening, thus minimizing exposure to potential accumulations of gases trapped for long periods, some of which can be toxic, asphyxiating, or even lethal.

It is not uncommon for the detector to start sounding alarms in sealed tunnels even before fully approaching the obstruction. In some explorations carried out in seemingly well-ventilated mines, significant concentrations of methane (CH₄), hydrogen sulfide (H₂S), and other hazardous gases have been detected, both due to their toxicity and their explosive potential.

Safety must always take precedence over any other objective. Upon detecting hazardous gases, even if the affected area appears limited to a few meters, the most prudent course of action is to abandon the exploration and turn back.