sentences:  In 1920, when water was pumped out, another cave was discovered, the "Nová býčí skála" (The New Bull Rock Cave), with the Jedovnický brook ("Jedovnický potok") running through it.During World War II, the Nazis built an underground factory in the cave, damaging the entrance area.After the war, a few more caves have been discovered ("Sobolova (Barová)", "Májová", "Prolomená" and "Proplavaná").