The Redridge Mountains lie to the east of Elwynn Forest and Stormwind, and is mainly a zone for Alliance players only, despite being labelled as "Contested Territory." What this means on a PvP server is that all players are immediately flagged upon entering, and are vulnerable to attack from the opposite faction. So in this case, high-level Horde are able to come in and kill any questing Alliance they might see running around. The only town in the zone is Lakeshire.
There are a variety of quests to do here, including some errands to get supplies to fix the town bridge, and murdering a wandering pig because she ate some woman's flowers. However, most of the tasks involve clearing the area of some unwelcome invaders, including gnolls and orcs, who have invaded from the mountains to the north.
The climactic series of quests takes you from the town into the surrounding mountains to attack the leader of the orcs in the overlooking Stonewatch Keep. It's not quite a dungeon, but you still needed a team to complete this, and it was a fun diversion from the usual solo questing.