Mysterious Labyrinth of Buda: Enigmatic Ancient Caves beneath Palace Suddenly and Inexplicably Evacuated by Police

Deep under the imposing stone walls of a 13th century palace, the Labyrinth of Buda contains, in its twisting paths and pitch-black corridors, the dark history of the ancient castle district of Budapest, where skeletons of the dead reveal violent deeds. Police raided the labyrinth and locked the doors for reasons unexplained. What was hidden beneath the streets of Budapest?