Yes, most lions live in dens.
This passage is in the Book of Daniel, which does not say. Since the historical evidence strongly suggests that the Book of Daniel was a second-century BCE work of fiction, there is no point...
He was thrown inPersian prison.
Daniel lived because God ensured the lions did not devour him.
Daniel was thrown to the lions den and mutch to the pharos surprise he lived and was found praying with the lions fast asleep