This small dungeon underneath a tower north of Ardougne. Not only does it have plenty of Ogres, but there are also two chests you can steal from. They give you 2 blood runes and 500gp. To enter the tower, you will need to picklock a door, which requires Thieving level 46, and it gives you 37.5 XP. To steal from the chests you will need Thieving level 59, and it gives you 250XP.