
From National Geographic:
A 2,000-year-old underground chamber has been discovered in Israel's Jordan Valley.
The largest human-made cave in Israel, the 1-acre (0.4-hectare) space is thought to have begun as a quarry. In subsequent centuries it may have served as a monastery, hideout for persecuted Christians, or Roman army base, experts say.
Archaeologists working in the valley found the cave this past March when they came across a hole in a rock face.
As they were about to enter, two fearful-looking Bedouins appeared and warned the team that hyenas and wolves inhabited the cave.
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