- This article is about the entrance to the Ancient Cavern. "Whirlpool" might also refer to a random event.
The Whirlpool is an object at the end of a long pier in the lake above Baxtorian Falls. Right-clicking on it gives the option to "Dive in". Jumping into it transports a player past the falls and to the shore on the east side of the lake at the bottom of the falls (just above the tourist centre), but the player will take about 816 life points of damage in the process. After doing the Pyre ship part of Barbarian Training, the player will instead be transported to the Ancient Cavern. If a player has a pet or a familiar out, they will not be able to enter until the familiar has been dismissed or the pet has been picked up.