Cave explorers discover deep pit in Croatia
Believed to be world's deepest subterranean vertical dropThe Associated Press
ZAGREB, Croatia - Cave explorers discovered a pit inside a mountain range in central Croatia believed to have the world's deepest subterranean vertical drop, at nearly 1,700 feet, a scientific institute reported Monday . . .
. . .At the foot of the Velebit cave are small ponds and streams, including one of the largest known colonies of subterranean leeches, Sutlovic Baksic said. . .
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