Lazio is the area around Rome. It has two geologically and geographically different parts.

Around Rome, the flat lands of the river Tiber, the coastal plains, and the hills are rather young. The hills were formed by a series of gigantic volcanic eruptions around the Albani Hills. The most obvious signs of this volcanism are the circular crater lakes Lago di Boldesna and Lago di Bracciano, and the numerous spas in this area.

The second, much older part is a chain of calciferous mountains, running roughly parallel to the main Apennine range, called Appennino Abbruzzese. This area it very interesting for us, as the limestone is karstified. The caves of this area lie all in this area.

 Calcata Cave Houses |  Grotta di Collepardo |  Tomba Francois |  La Grotta Dei Germogli |  Pozzo del Merro |  Grotta di Pastena |  Re Tarquinio |  Pozzo Santullo |  Sacro Speco
 Roma:  Catacombs of Rome |  Cloaca Maxima |  Lupercale |  Mithraeum San Clemente |  Sacre Grotte Vaticane |  Villa Torlonia

See also

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