There are various zones throughout the game that have repeatable quests. Some are true repeatable quests that may be picked up immediately after completion, others have a timer before you may accept them again.
Daily Repeatable Quests Edit
Each of the three gathering zones have a scalable instance with daily repeatable quests.
Most of the villas in Tarantia Noble District have a daily repeatable quest tied to them.
Repeatable quests in instances typically scale to the level of the first person who enters, and when you've cleared the instance most mobs don't respawn until the following day.
Unlimited Repeatable Quests Edit
Wanted posters at quest hubs contain multiple repeatable quests. They award experience immediately upon completion without requiring a turn in, and may be obtained again without a cooldown.