Spirit world of Morytania

Walkthrough
Make sure you have a slayer helmet, Jennica's ring, ghostspeak amulet and a spirit shield. Talk to Ghost maiden in Morytania.

Access to spirit world in Morytania
It looks similar to Wilderness spirit world, but watch out for dust if you don't wear Slayer Helmet. Make sure you have to fight a Ghost Necromancer. Here, you have to chop trees and light fire to see the portal coming.