Abisso Bonetti
karst cave in northeastern Italy
Abisso Bonetti ("Bonetti Abyss") is a Karst cave in the municipality of Doberdò del Lago (Gorizia, Friuli-Venezia Giulia, Italy), 1 km (0.62 mi) SE from the small village of Bonetti, near Slovenian border (village of Nova vas). The cave is one of the most famous cavities in the Gorizia Karst. Anyway, due to its dangerous pit opening, entry is allowed only to expert cavers with the necessary equipment for single-rope descend.
Morphology
Abisso Bonetti is one of the biggest and most well-known cavities in the Gorizia Karst. It opens 186 m (610 ft) above sea level, on a small plateau north of Jamiano (Doberdò del Lago), near Slovenian border. Overall, it is 87.5 m (287 ft) long and 49 m (161 ft) deep.
Peculiarity of the cavity is its impressive opening, a 48 m (157 ft) deep, 30 m (98 ft) for 10 m (33 ft) wide abyss, that's an open pit in direct connection with the external environment. The cave has another entrance, that's a partially artificial gallery connected with the pit. During World War I, Austro-Hungarian Army built a shelter in the gallery. The bottom part of the open pit contains a rubble slope where detritus, plant materials and animal carrions, fallen down from the external environment, are collected.
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