1.Level Goodie Cave in Shadow Woods North (left of some stairs near the middle 
  of the Woods): Can increase the level of party members to the maximum of 99. 

2.Weapons Goodie Cave in Thial Mountains South (slightly north of entrance when 
  entering from Shadow Woods South): Contains the best weapon for each party 
  member’s character.

3.Gold Goodie Cave in Brightwood Forest (a little right to one of the small 
  waterfalls): Contains 600,000 gold coins.

4.Armor Goodie Cave in Thial Mountains North (a little north of the entrance
  from Istir Forest): Contains the best armor for each party member’s character.

5.Spell Goodie Cave in Stormbend (close to the ocean behind the chest): 
  Stella can learn all available spells.