I assume you are talking about the Skavid caves that are located around Gu'Tanoth. In order to navigate the caves, you need a Skavid map, which can be obtained during the Watchtower quest. The map can be obtained by visiting the ogre City guards shown on the map, you will need a Rock cake to bribe a guard, 20 Coins to pay a guard to let you jump over a bridge, and a Death rune to give to a guard to get the map.
The rock cake can be obtained from the food stall in Gu'Tanoth.
After the quest, if you lose the map you can get another one from the same place, except you do not need 20 coins, a rock cake, or a death rune.
If you haven't completed the Watchtower quest, I strongly suggest you complete it
.
Not only will the completion of the quest allow you to finish your clue scroll, but it will also unlock the Watchtower Teleport spell
.
~Vandite