Rogues castle in level 53 at the East side of the wilderness. You'll need to dig at the location shown in the map below while having the clue scroll and navigation tools in your inventory. Be ready to fight a lvl 65 wizard that will attack you with the flames of Zamorak spell, you'll need to use the protect from magic prayer. Avoid bringing items that you are not prepared to lose. If you are attacked by another player you can teleport away unless you're above level 20 wilderness, at higher levels you have to log out before you are being attacked. At the west side of Rogues castle resides the aggressive Chaos elemental, it's better if you avoid this area as it will attack you with powerfull magic spells and tries to unequip your weapon and armour. Have auto retaliate set to off in the area around Rogues castle, so you can run away fast from the Chaos elemental.

Required items: clue scroll, watch, sextant, chart, spade, weapon, two pieces of armour, anti poison, teleport runes and food.

Required quests: none.

Possible way of transport: Walk North-West from Varrock, go past the Graveyard of shadows and the Ruins, then go East of Red dragon isle to the Demonic ruins then go all the way east to the East gate and walk to the castle. You can also use any teleport portal to teleport to the level 50 portal South-West of the Rogues castle or use the Ardougne lever go out the gate to the south and walk on the south side of the fence to avoid the chaos elemental then go in the gate all the way to the east again and walk to the castle.