Gnarled Root Dungeon

The Gnarled Root Dungeon, located in North Horon, is the first dungeon (or rather, Level 1) in Oracle of Seasons. The mini-boss is Goriya Bros., and the item found is the Seed Satchel containing Ember Seeds. The boss is the terrifying dragon Aquamentus. The Gnarled Key is required to enter. Overall, it is a very simple first dungeon that can be solved without much practice.

Coincidentally, not only is its entrance- a gnarled, dead tree- similar to the Eagle Labyrinth, the two dungeons also share the same boss. Also, in Norse mythology there is a dragon named Níðhöggr that gnarls on a root of Yggdrasil - compare with the fact that the boss of this dungeon is a dragon.