The Shattered Isles Quest/Spoiler

You need to travel from Liberty Bay to Thais. You will get shipwrecked on this Island of Goroma (40% chance, so you might need to travel many times). The Captain will say that some Island Trolls stole supplies to fix the boat. Go kill Island Trolls until you have collected 30 pieces of wood and then go give them to the Captain. Now he will take you to Goroma from Liberty Bay whenever you want, for 500 gps.

This is good for higher levels since Goroma links to all of the Forbidden Islands and they contain lots of strong monsters.

A hole on the island contains a dead body and a force field of some sort. In the body you can find the Spellbook of Goshar that once belonged to a apprentice of a voodoomaster. You may trade this item to Chondur on Meriana to recieve a counterspell enableing you to pass through the forcefield mentioned above.