The King was only 19 when he died and there was little time to prepare a larger tomb more suitable for royalty, but it was still filled with treasures for use when the King arrived at the Other World.
The ancient Egyptians filled their King's tombs with treasures.
From here you can ascend a hill to the old Seminario de San Miguel (Saint Michael's Seminary) which offers panoramic views of Orihuela below and a ruined castle above.