Archaeologists still aren't entirely sure where a secret passageway beneath a castle in Turkey leads, but visitors can now explore it for themselves. Not far from where Vlad the Impaler—the inspiration for Dracula—was reportedly held in one of two dungeons inside Tokat Castle, the tunnel stretches for about 100 feet before the path is blocked, reports Hurriyet Daily News. "We have made progress. Since it has an angle of 45 degrees, it is hard to remove stones and earth," culture and tourism director Abdurrahman Akyuz says of the tunnel, found during restoration efforts in 2009. "We think that this tunnel...