The Wailing Caverns in Northern Barrens is one of the first instanced dungeons (Outside of a major city) that lower level players encounter.
This instance is extremely conducive to solo play for characters of most classes after around level 30 to 35. At these levels one will be all but immune to some of the more troublesome effects, such as the Druids of the Fang's sleep spell.
Even the poor quality drops are better than ordinary.
