Overview
Long Hole – officially Poll na bPéist (the Serpent’s Lair) – is one of the Aran Islands’ most photographed natural features. It sits on the west side of Inis Mór, the largest of the three Aran islands, about 1.6 km south of the iconic Dún Aonghasa fort and a short walk from the tiny hamlet of Gort na gCapall. The rectangular pool is a naturally‑carved limestone blow‑hole that fills with turquoise‑blue water when the tide rushes in, creating a dramatic splash that can be seen from the cliff edge. The site is free to visit and is a favourite stop on self‑guided tours, photography outings and, for a few daring professionals, a Red Bull cliff‑diving arena.
History & Folklore
The Wormhole is the product of millennia of Atlantic wave erosion acting on the island’s Burren‑type limestone. Subterranean caves and channels were worn into the rock, eventually forming a straight‑walled pool that looks almost engineered. Measurements vary between guides: the most commonly quoted size is ≈10 m long, 7 m wide and 4 m deep, while some sources give a larger footprint of up to 25 m × 10 m and a depth of 10‑20 m.
Local legend calls the site the Serpent’s Lair – a nod to the péist, a sea monster from Gaelic mythology. Folklore tells of offerings being thrown into the abyss to appease the creature, and some locals even claim the water has healing properties. In modern times the Wormhole entered the world of extreme sport when the Red Bull Cliff Diving World Series chose it for stages in 2012, 2014 and 2017. Divers leapt from a platform 27‑28 m above the water, performing acrobatic feats that highlighted the sheer drop and dramatic setting. The concrete footings of the platform remain as a reminder of those events.
What to See & Do
- Watch the tides – At high tide sea water surges through hidden channels, spilling over the rim and creating a vivid turquoise splash. Winter tides often produce the most powerful action, while low tide reveals the stark limestone geometry, ideal for close‑up photography.
- Photography – The contrast between dark grey rock and bright blue water is striking at sunrise, sunset or under a clear midday sky. The rectangular shape frames the scene perfectly for both landscape and detail shots.
- Cliff‑diving spectacle – If you happen to be on the island during a Red Bull event (dates announced on the Red Bull website), you can watch world‑class divers launch from the 27‑28 m platform. Even outside event years, the former platform footings are visible and the site continues to attract thrill‑seekers.
- Combine with a walk – The Wormhole lies on a pleasant coastal path that links Dún Aonghasa to Gort na gCapall. A leisurely walk or bike ride lets you soak in the rugged coastline and other Aran highlights.
Practical Information
- Access: The site is reachable on foot or by bicycle from the main road that circles Inis Mór. There is a short, well‑marked trail from the nearest parking area near Gort na gCapall.
- Opening hours: Open year‑round, 24 hours – the natural feature is not gated.
- Facilities: There are no built‑in toilets or cafés at the Wormhole; visitors should bring water, snacks and appropriate clothing.
- Safety: The pool’s edges are steep and the water can be deep and cold. Wear sturdy shoes, keep a safe distance from the cliff edge, and never attempt to swim in the pool during high tide.
- Best visiting times: Early morning or late afternoon for soft light; high tide for the splash effect; winter months for the most dramatic wave action.
- What to bring: Camera, waterproof jacket, sturdy walking shoes, tide table (available locally or online), and a sense of adventure.
Visiting Tips
- Check the tide before you set out; the dramatic splash only occurs at high tide, and low tide can leave the pool dry and the rocks slippery.
- Footwear: Sturdy, ankle‑supporting shoes are essential – the approach includes uneven, rocky ground and occasional steep sections.
- Weather: The site is exposed to the Atlantic, so wind and spray are common. A waterproof jacket will keep you comfortable.
- Leave no trace: Carry out any litter and stay on the marked path to protect the fragile limestone environment.
Enjoy the raw beauty of Long Hole – a place where geology, myth and modern sport converge on the wild west coast of Inis Mór.