A wild, wild place.
Undomesticated, savage, untamable: these are some synonyms for wild.
Primitive, uncivilized, uncultured, barbaric.
Unpopulated, rugged, rough, inhospitable, desolate, barren.
Stormy, squally, tempestuous, turbulent.
Disheveled, tousled, tangled, untidy.
Unrestrained, out of control, undisciplined, unruly, disorderly, riotous.
The mind is a wild, wild place.