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Pozzo del Merro

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Similar  Hranice Abyss, Hůrka u Hranic, Dean's Blue Hole, Zbrašov aragonite caves, Sótano del Barro

Pozzo del merro

Pozzo del Merro is a flooded sinkhole in the countryside northeast of Rome, Italy. Situated at the bottom of an 80 m conical pit, at 392 m (1,286 ft) it is the second deepest underwater vertical cave in the world. In 2000 two ROVs were sent to explore its depths; the first, the "Mercurio (Mercury)" reached its maximum operative depth of 210 m (690 ft) without reaching the bottom. The second ROV, "Hyball 300", reached 310 m (1,020 ft) without touching down either. A third dive in 2002 with the more advanced "Prometeo" robot reached the bottom at 392 m (1,286 ft), but discovered a narrow passage continuing horizontally.


Map of Pozzo del Merro, 00010 Sant'Angelo Romano, Rome, Italy

The sinkhole, similar to the Zacatón cenote, was formed by volcanic activity eroding the carbonate rock.

Pozzo del merro


Pozzo del Merro Wikipedia

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