Almone
Coordinates: 41°51′57″N 12°30′59″E / 41.86583°N 12.51639°E
The Almone (Latin: Almo) is a small river of the Ager Romanus, a few miles south of the city of Rome. Today the river is polluted and is channelled to a sewage treatment plant and no longer reaches its natural confluence with the Tiber.
The Latin name of the Almone, Almo (also the name of its corresponding deity), is derived from the Latin word , meaning "fertile" or "nourishing," which may derive from its connection to Cybele, also known as Magna Mater ("Great Mother").
In modern times the stream has been called Marrana della Caffarella. Marrana (or marana in Roman dialect) is a term that derives from the name of the ancient ager maranus, the fields that surround the Via Appia, and refers to the drainage channels that flow through the countryside near Rome. "Caffarella" refers to the valley, now a park, that the river runs through. The river has also been known as Acquataccio, a name with two possible derivations. It either refers to the nearby Appian Way, a corruption of Acqua d'Appia (which became d'Accia), or the suffix is to be taken in its pejorative sense, and it refers to the marshy waters of the Caffarella valley.
The Almone originates in the Alban Hills from springs fed by the water of Lake Albano, and runs through the Appian Way Regional Park, fed by the waters of the numerous springs present in the area, including the so-called Acqua Santa ("Holy Water") of the Fonte Egeria. There, the Via Ostiensis crossed the river with a bridge known as the Travicella.
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