Today I went on an adventure into the subterranean complex of the Frasassi Caves. They extend  for 30 km on 8 geological levels and is one of the largest and most fascinating subterranean routes in the world. Beginning with the mixture of bicarbonate water from the Sentino River and the mineral sulfurous water coming from … Continue reading Le Grotte di Frasassi / The Frasassi Caves