After Húrin's deed, the caves were probably completely abandoned, as they fall out of recorded history in Tolkien's fiction, but they were certainly drowned and lost along with the rest of Beleriand at the end of the First Age.
After Húrin's deed, the caves were probably completely abandoned, as they fall out of recorded history, but they were certainly drowned and lost along with the rest of Beleriand at the end of the First Age.
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