Swiss Military Bunkers
Even in what is deemed to be a neutral country, Switzerland was ready for plenty in the way of military attacks back in the day. They created a huge network of secret bunkers located within rocks, barns, or hillsides. Most have been long abandoned, but even still, the Swiss military bunkers, located in the Alps in Switzerland, are the exact definition of camouflage. Wow.
Cambridge Military Hospital
The Cambridge Military Hospital was the first military base hospital. It opened its doors in July, 1879 in Hampshire, England. The hospital welcomed soldiers directly from the Western front during war. The hospital served multiple functions for a century, including being the first hospital to perform plastic surgery, and eventually closed down in the 1990s due to the high costs of operating an aging building. Some recent reports have developers hoping to turn parts of the empty building into housing.