grotta di fracassi, genga, italy. inside one of the biggest caves in italy. stalactites and stalagmites

cave formation quail caving geology rock stalagmite wadi temple stalactite person canyon night terrain darkness painting tunnel grotta fracassi genga italy inside one biggest caves stalactites stalagmites fracassi genga italy europe cave rock nature stone cavern stalagmite stalagmites landmark famous park excursion guide indoors spooky background natural dark darkness lights travel stalactite underground landscape geology mountain canyon wall light tourism limestone rocks natural grotto ancient tree water