Strange portals are found during the quest Desperate Times, where the player uses them to obtain the key to meet Charos. The portals are used to enter a room with a sliding puzzle in the middle and several smaller rooms containing chests. Inside that room, there are other portals that unlock doors if the correct-coloured portal is stepped on. There are three portals to this room. One is on the south-east side of the Varrock Dig Site. Another portal is found in a bedroom on the 1st floor[UK]2nd floor[US] of the Varrock Palace behind a clothing screen. A third portal is located on the ground floor[UK]1st floor[US] of the Black Knights' Fortress.
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