To begin with, cross the northern bridge for a pair of Treasures. Moving on, you'll soon run into Tellah, who will join you (provided you spoke to Rosa in Kaipo). Tellah has a lot of HP and MP, but not very powerful Spells. His Bolt1 Spell (and Rydia's, after level 5) does a number on most of the Monsters here, although he'll need to use Fire1 on Zombies since Rydia can't. WaterBugs are annoying because they'll heal themselves if you hit them with magic, and tend to run away when left alone.
After meeting Tellah, head to the northeast corner of the Map where you can enter the water. You'll find an Iron Ring for Tellah in the chest to the north, but if you follow the water southwest and enter the Waterfall, you'll find a secret room with some very nice potions.
After meeting Tellah, head to the northeast corner of the Map where you can enter the water. You'll find an Iron Ring for Tellah in the chest to the north, but if you follow the water southwest and enter the Waterfall, you'll find a secret room with some very nice potions.