The lost underwater city of Atlantis is a remnant of powerful civilization that has long passed away. What remains are desolate ruins that have been hidden to the populations of Valeria for eons. It is eerily quiet and the only signs of life are the fish and other sea creatures that hide in the crevices and cracks of the demolished city. What treasures and surprises lie buried under all the rubble?
Like the Demi-Quests, Atlantis does not have a special, unlockable mission at the end of the area. Reaching 100% influence in 4 out of the 5 quests will not do anything special.
This is the only area in the game where there are no sub-quests to the quests. The 5 quests that you can see when you first unlock Atlantis are the only 5 quests available in Atlantis.
Atlantis is a good way for low level players to earn gold and experience. They offer decent amounts of gold and experience for every quest that you complete. The only cost is to purchase the General Nautica for 150,000,000 gold coins for Main Quest 1 & 5. All other generals should already have been purchased. All of the quest requirements listed above are obtained from slaying Sea Serpents, (though they can drop from other monsters as well). If you need gold, but haven't unlocked the Demon Realm yet, this is both an easy and cheap way to get it.
While it is true that all of the quest requirements for this land drop from monsters, it is also true that they only drop from monsters. You can not buy any of the Soldiers and Equipment listed above.