From A Wiki of Ice and Fire
The Fingers by Cris Urdiales ©
and the location of the Fingers
The Fingers are four narrow peninsulas of the Vale of Arryn which extend out into the narrow sea and the Shivering Sea. They are windswept, treeless, bare and stony. It often rains in the Fingers. The seat of House Baelish sits on the Fingers, an unnamed, old flint tower. Pebble is north of the Fingers and the Paps is northeast, while Coldwater Burn and Snakewood are west of the peninsulas.
The Andals first arrived on the Fingers when they invaded Westeros. They chiseled the seven-pointed star of the Faith of the Seven onto boulders to mark where they landed.
A Clash of Kings
Davos Seaworth is sent by Stannis Baratheon with a chest of letters to spread word of Joffrey Baratheon's illegitimacy. His route is to sail to the Fingers and other harbors along the narrow sea.
A Storm of Swords
Petyr Baelish and Sansa Stark sail aboard the Merling King from King's Landing to his family's tower in the Fingers, where Petyr weds Lady Lysa Tully.
References and Notes