Quests for Classic dungeons come from outdoor quest lines, typically from the zones where the dungeons are located. In Wow gold classic some later dungeons you'll find quests indoors, but that practice did not really begin in earnest until the LFG system was created. This implies that if you would like to do dungeons while leveling, you will often complete a zone , then attempt to find a group for that zone's dungeon.
If you're new to, or leaping back into, the World of Warcraft experience, we hope this WoW Classic starter guide has been handy. Don't forget to buy wow gold safe have a look at our additional guides for more-specific strategies on World of Warcraft Classic.