Brestovac Sanatorium
Brestovac Sanatorium is a sprawling, abandoned medical complex hidden in the thick forests of Mount Medvednica above Zagreb. Built in 1909 by journalist Milivoj Dežman out of love for the tragic actress Ljerka Šram, who suffered from tuberculosis, the facility became a premier pulmonary treatment hospital. However, during World War II, it was converted into a military hospital where hundreds of wounded soldiers were executed in 1945. Left to crumble after its final closure in 1968, Brestovac is now one of Croatia's most famous urban exploration and haunted hotspots.