Jeremiah breaks in upon Jehovah’s threats of wrath with lamentation for his desolated country.
mountains - once cultivated and fruitful: the hillsides were cultivated in terraces between the rocks.
habitations of ... wilderness - rather, “the pleasant herbage (literally, ‘the choice parts’ of any thing) of the pasture plain.” The Hebrew for “wilderness” expresses not a barren desert, but an untilled plain, fit for pasture.
burned up - because no one waters them, the inhabitants being all gone.
none can pass through them - much less inhabit them.