|Location on World Map|
|Mushroom Forest||←||House on the Hill||→||Unknown|
The House on the Hill is a location on Fossil Island. Located on the northeast side of the island, the House on the Hill can be travelled to by climbing a hill on the south end of the Mushroom Forest.
The House appears to resemble buildings found commonly in dragonkin architecture. The western side of the House, which appears to be a port for ships, or possibly a landing spot for dragonkin (as they can fly), is fitted with compass rose, which is a symbol often associated with the dragonkin. East of the house, there is a smaller structure, where in the centre lies a 'Strange Stone', which upon examination the player will read It seems to have been hit with swords. There is no option to attack the Strange Stone however, and using a sword on it does nothing.
Located within the House on the Hill there are three strange machines.
- The northern machine is used in creating the ancient wyvern shield by using a wyvern visage on it while having a hammer and an elemental shield.
- The eastern machine allows players to use enriched bones on it to gain Prayer experience. Using non-enriched fossils on it will destroy them without anything in return.
- The southern machine can enchant a digsite pendant to allow players to teleport directly to the House.
In addition, one of the four Magic Mushtrees on the Island can be found here, allowing quick access to other parts of the island by teleporting here via digsite pendant, then using the magic mushtree to travel.
In the basement of the House, accessible via a trapdoor in the south east corner, there are several stone chests with a search option. Searching the stone chest will ask for a numulite. After inserting the numulite, the chest will give the search option to insert 100 numulites into the hole. The chests have a chance of having nothing happen, dealing damage, or giving one of various notes. The notes can be added to the player's Fossil island note book. In addition, behind the ladder, a pile of books can be searched to obtain an ancient diary.