Any visitor to the Southeast European country of Albania will undoubtedly stumble across one of its hundreds of thousands of concrete bunkers that have dotted the landscape for over six decades.

Norway's proximity to the USSR in the Cold War led to it building many military bunkers – some of them vast secret bases.

About 1,000 concrete bunkers with trenches, anti-tank trenches, ammunition storage and supply shelters are part of a joint ...

U.S. military bunkers across the Middle East are getting new doors and added protection as recent events draw attention to indirect blast-related injuries. To date, more than 400 concrete bunkers ...

Tensions with Russia have brought the bunkers back into focus ... with their rough rock walls, gleaming concrete and military equipment. Carved out of a mountain side, protected by around 900ft ...

Potential adversaries may use reinforced concrete with significant ... ideal for destroying fortified bunkers and underground facilities which house sensitive military hardware or command centers.

Norway's proximity to the USSR during the Cold War led to it building many military bunkers – some of them vast secret bases for planes and ships. Tensions with Russia have brought the bunkers ...