In addition to unique sights, Lutsk has a system of dungeons. These unusual three-story dungeons were used for sacred objects, refectory, prison, tombs. The underground complex under the Saint Peter and Paul Cathedral headed the top five of the most mysterious dungeons of Ukraine according to the ILoveUkraine project site. Their height is truly impressive, reaching almost 6 meters in some places. It is said that once the Old Town was connected with Shepelsky and Zhidychyn settlements, Olytsky castle and other fortifications around it by these dungeons. In these places were burials (some preserved) of many noble citizens, including Roman Catholic bishops.