First, you'll need to dig up 3 items:
- Swamp Mud at the Sticky Swamp
- Pure Water at the Fountain of Youth
- Basalt Shard at the Basalt Slopes
Remember to repair your shovel at the Coral Mines when used!
When you have these 3 ingredients, you move to the Underwater Dome (Scrobscuba Caller needed!). Talk to the Archsage and fight the Earth Elemental. After this you'll receive the Zor's Gloves.
Move to the Mutant Falls and talk to Master Hydragol. He will give you Waterlilly Pads, wich makes you able to enter the Grumhel Forest.
Enter the Grumhel Forest and head to the Haunted Hills. Talk to the Strange Man and fight a Korgon (this is really easy!). After this, you got yourself the Lantern wich makes you able to travel to the Deep Gorges.
You need to walk all the way back, because you can't cross Jumin River yet!