At the top of a hill in Budapest, overlooking the Danube River, sits Buda Castle, a gorgeous UNESCO World Heritage site visited by thousands of tourists every year. Directly underneath the castle, however, lies a less-frequented tourist attraction: a series of ancient, naturally formed caves with a colorful and sometimes disturbing history.
The entire cave system is over six miles long, and most of that has been left unchanged since it was used as cold storage (and a rumored dungeon) in the Middle Ages. Between 1939 and 2008, however, a half-mile stretch of those caves was built up and repurposed many times over. Known as Sziklakorhaz or The Hospital in the Rock, its many uses are a testament to the area’s involvement in World War II and the Cold War.
At the start of World War II, the location served as a single-room air raid center, but operating theaters, corridors, and wards were quickly added to create a much-needed hospital. By early 1944, the hospital had officially opened inside the cave, tending to wounded Hungarian and Nazi soldiers. After less than a year of operation, the facility found itself facing its largest challenge—the Siege of Budapest, which lasted seven weeks and was eventually won by Allied forces on their way to Berlin.
As one of the few area hospitals still operational, the Hospital in the Rock was well over capacity during the siege. Originally built to treat around 70 patients, close to 700 ended up crammed into the claustrophobic caves. The wounded lay three to a bed—if they were lucky enough to get a bed at all. Unsurprisingly, heat from all those bodies raised the ambient temperature to around 95°F, and smoking cigarettes was the number one way to pass the time. Add that to the putrid mix of death, decay, and infection and you’ve got an incredibly unpleasant wartime cocktail.
A recreation inside the museum. Image credit: The Hospital in the Rock
Source : http://mentalfloss.com/article/504730/heres-how-take-trip-around-world-less-1500