Lighthouse

The Lighthouse is an area north of the Barbarian Outpost, and features prominently in the Horror from the Deep quest. The Lighthouse can only be entered during and after the quest, however the island itself can be visited prior to starting the quest. Its dungeon is a popular place for players to kill dagannoth for Slayer. Jossik can be found upstairs after completing the aforementioned quest. He runs a general store and will provide players with God books, as well as replace any that are lost.

Getting there
The Lighthouse is in a somewhat remote area. Players can get there from the Barbarian Outpost by jumping across the northern basalt rocks that protrude from the sea. It is possible to slip on the rocks, which results in the player falling into the water, being swept back to shore, and taking damage. It is noted that having an Agility level above 35 increases the likelihood of successfully jumping across the rocks. Players seem to have a lot of trouble getting over the rock as the character "fails" to jump over it several times.

Another route of access is via a bridge, which is fixed during the quest. The bridge is located in the south-western part of the Fremennik Province. If the bridge has not been fixed, the player can jump across it, but this will cause damage.

There are three teleports that arrive near the Lighthouse:
 * A Games necklace teleport to the Barbarian Outpost.
 * Teleport to House, if the player's house is at Rellekka.
 * An Enchanted lyre teleport to the entrance to Rellekka.

The Lighthouse
The Lighthouse is the start point of the quest Horror from the Deep, and is where most of the quest takes place. It cannot be entered until Larrissa, who stands outside the Lighthouse, gives the player the Lighthouse key. After unlocking the door for the first time, the key is no longer needed.

Dungeon
The dungeon is a single large chamber. The westernmost part is a pool of water, presumably connecting to the sea outside, while the rest is dry land.

After the quest, the dungeon is crawling with many dagannoth. It is a multi-combat area, and the dagannoth here, although moderately strong, are inaccurate in their attacks and are not as powerful as their levels suggest. The lower level dagannoth shoot spikes at players as a rather poor ranged attack, and the higher level dagannoth attack with a slightly more accurate close-range bite. Many dagannoth wander about near the entrance ladder, so players should be prepared for combat as soon as they descend into the dungeon.

Personalities

 * Jossik
 * Larrissa

Monsters

 * Dagannoth
 * Dagannoth Mother (only during quest)

Quests

 * Horror from the Deep (required to enter the Lighthouse)

Music

 * Lighthouse
 * Out of the Deep (unlocked during Horror from the Deep quest.)1