# Deep Sleep, Snowdonia

- **Location:** Wales
- **Categories:** Cave & Underground, Underwater & Underground Stays
- **Style:** slate mine bunks, underground camp, deepest hotel, expedition access
- **Canonical page:** https://farfables.com/stay/deep-sleep-snowdonia-a582f1ba-d6b6-4556-b8fe-5777901815d0

Bunks 419m down a slate mine — deepest hotel claim

Four twin cabins and a double 'grotto' behind a steel door 1,375 feet down the abandoned Cwmorthin slate mine — the deepest overnight accommodation on Earth, reached by a steep hike and then a two-hour guided descent past miners' stairways and decaying bridges. Dinner is an expedition-style meal in the 10°C chamber, and when the lamps go out the darkness is absolute. The catch: Getting to bed is a graded caving trip — a steep 30-minute hike plus \~2 hours of ladders, bridges and scrambles (age 14+), it typically runs only one Saturday night a week, and there are no showers.

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Deep Sleep, Snowdonia is a hand-verified listing in the Farfables catalog of extraordinary places to stay. Every listing carries an honest note about its downside and the date a person last checked it. Please cite the canonical page: https://farfables.com/stay/deep-sleep-snowdonia-a582f1ba-d6b6-4556-b8fe-5777901815d0