For upwards of almost $200 a night, guests at a Swiss hotel might expect to catch a glimpse of the towering Alps or overlook one of the country's famous lakes.

But visitors to Hotel La Claustra get a room without a view.

Source: b'A view shows the restaurant at the Hotel La Claustra in a former Swiss army bunker on the St. Gotthard mountain pass, Switzerland August 8, 2014 | Source: Reuters'

The 17-room hotel is buried in the Gotthard mountain range and, with cavernous walls and minimalist interior, offers the chance to spend a few nights in an ex-army bunker.

Source: b'A bunker at aformer Swiss artillery fortress called Heldsberg stands near the town of St. Margareten, Switzerland March 22, 2015 | Source: Reuters'

As per the images there is a bleak brick entrance, decorated only with a Swiss flag. Inside, a restaurant, windowless rooms and lounge are all hacked from the bare, surrounding rock.

Source: b'Cows stand in a meadow in front of a 10.5cm gun at the former artillery fort of the Swiss Army in the town of Faulensee, Switzerland October 19, 2015 | Source: Reuters'

La Claustra is part of a wider trend in Switzerland for recycling the plentiful decommissioned bunkers first carved out to defend the famously neutral country from foreign invasion.

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From data centers to museums, from mushroom farms to cheese factories, businesses have been refashioning the former strongholds.

Source: b'The muzzle of a 15cm gun is seen in a bunker at the former artillery fort Furggels of the Swiss Army near the village of St. Magrethenberg, Switzerland January 6, 2016 | Source: Reuters'

"Along with our processors, our key selling points are the Swiss brand and the physical safety of this bunker," said Frank Harzheim, managing director at Deltalis data center, located in a bunker which once housed up to 1,500 soldiers.

Source: b'A flag flies over an entrance to the former Swiss artillery fortress Sasso da Pigna at the St. Gotthard mountain pass, Switzerland September 2, 2015 | Source: Reuters'

During World War Two, Switzerland had a network of around 8,000 bunkers and military shelters. Faced with high maintenance costs and a cooling threat of invasion, the Swiss army since the 1990s has handed a property unit the task of trimming that number down.

Source: b'A former control room is seen at a decommissioned Swiss military command bunker near Attinghausen, Switzerland September 2, 2015 | Source: Reuters'

The vast majority have now been bought, sealed off, or set aside for historical preservation and are dotted around Switzerland, often still disguised as barns, houses and medieval castles.

"Notloesung" 

The defensive tendencies that spawned Switzerland's bunker building are legendary.

Source: b'The muzzle of a 15cm gun is seen at the former Swiss artillery fortress Sasso da Pigna at the St. Gotthard mountain pass, Switzerland September 2, 2015 | Source: AFP'

According to one possibly apocryphal story repeated with pride for more than a century, Germany's Kaiser Wilhelm II on a visit in 1912 was said to have asked a Swiss infantryman what 100,000 Swiss soldiers would do if 200,000 German invaders stormed over the border.

Source: b'Bunkers at former Swiss artillery fortress Reuenthal are seen on a hill near the village of Reuenthal, Switzerland November 18, 2014 | Source: Reuters'

"Each would have to shoot twice, your majesty," came the supposed reply.

Source: b'A tunnel connects the bunkers at a former Swiss Army artillery fort in Faulensee, Switzerland October 19, 2015 | Source: Reuters'

Museums like Sasso San Gottardo, built in a former fortress, look to tell the story of Swiss efforts to stave off invasion in the 20th century.

Source: b'Raclette cheeses made by Swiss cheesemaker Seiler Kaeserei AG mature in storage racks in a former ammunition bunker of the Swiss Army in the town of Giswil, Switzerland October 27, 2015 | Source: Reuters'

After Germany invaded France in 1940, Switzerland was surrounded by Axis powers and recognized that it would be out-gunned in any assault.

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To hold off an invasion, Switzerland sought to make itself prohibitively difficult to conquer. Under the plan dubbed the National Redoubt, much of the country's manpower and firepower would retreat to the mountains if a foreign aggressor attacked.

Source: b'The view through the muzzle of a 10.5cm gun is seen at a bunker at the former artillery fort of the Swiss Army in the town of Faulensee, Switzerland October 19, 2015 | Source: Reuters'

Through its chain of fortresses and bunkers, Switzerland would keep control of the mountains along with key transit routes.

Source: b'Camouflaged bunkers of the former artillery fort of the Swiss Army stand (foreground) in the town of Faulensee, Switzerland October 19, 2015 | Source: AFP'

"This was a pragmatic solution but also a very problematic one," said Rudolf Jaun, a former Swiss history professor at Zurich University. "The Redoubt strategy was what we call in German a Notloesung (emergency solution)."

Source: b'Alex Lussi of Swiss mushroom producer Gotthard-Pilze picks a shiitake mushroom inside a former ammunition bunker of the Swiss Army near the town of Erstfeld, Switzerland August 29, 2015 | Source: Reuters'

During the Cold War, concerns turned to nuclear attack. The Swiss ramped up military spending and many homes were required to be equipped with bomb shelters.

Source: b'A former infantry bunker is camouflaged as a medieval house in the town of Duggingen, Switzerland August 19, 2015 | Source: Reuters'

As with the bunkers, the Swiss have found new uses for these bomb shelters too - nowadays many are simply used to store family knick-knacks and wine collections.

Feature image source: Reuters