Beneath #Odesa lies a vast limestone #Labyrinth, one of the world's largest urban tunnel networks. The #OdesaCatacombs has 3 levels, in part 60m deep & 2500km long - but it is not fully mapped. +90% are thought to be #Coquina stone mines needed to build the city above. Used as #WW2 shelters, lost souls & eerie echoes haunt its hidden chambers - some never return #UkrainianMyths
In Source: Odesa Catacombs
