“The castle, standing near the junction of the two lakes of Llanberis, is the only one that remains in all the narrow passes of North Wales. As it was impossible for an enemy to climb the chain of mountains, which are a guard to Caernarvonshire and Anglesey, and as there were five narrow passes, the British secured each with a castle : this was the central. What remains of it is a round turret only, its inner diameter ten yards, and twenty-five yards high, which seems to have been the principal part of this fortress, for it occupies the whole of a small elevated rock. One of the bastions of Caernarvon castle is nearly the size of this ; it could not accommodate more than fifteen men. The British race of kings acted on a small scale compared with the Norman. In this castle Owen Goch was confined for upwards of twenty years, for having joined in a rebellion against his brother Llywelyn ap Gruffydd, the last Prince of Wales. It seems to have been long in ruins, for in Leland’s time there was only a piece of a tower left. The key of the castle is kept at the Victoria Hotel, and may be had by tourists on application.
“The view from hence is the most splendid imaginable, embracing the two lakes, extending nearly three miles, with the various interesting objects by which they are surrounded, including the enormous chains of mountains that bound the vale. Nothing can exceed the beauty of the ruin as it appears from the lake : the promontory on which it stands ; its image reflected from the crystal waters ; the lofty mountains on each side ; the upper lake stretching to the church of Llanberis, with Snowdon in the back ground.”
— Joseph Hemingway, Panorama of the beauties, curiosities, and antiquities of North Wales, exhibited in its Mountains, Vallies, Waterfalls, Lakes, Cities and Towns, Castles and Ruins, etc. Intended as a Pocket Companion to the Tourist and Traveller., 1839