Mount Isa Underground Hospital and Museum A trip to the hospital isn’t usually on your holiday to-do list. But make an exception in Mount Isa, where you can visit the restored Underground Hospital. Built in 1942 by off-duty miners as a wartime civilian hospital, it was constructed underground due to the looming threat of aerial bombing during the war. Nowadays, you can take a guided tour and take a step back in time as you wind through its tunnels and view memorabilia.