Pollnagollum Cave is a waterfall and cave mouth tucked into Belmore Forest on the slopes of Belmore Mountain, a half hour or so outside Enniskillen in County Fermanagh. On its own terms it's a minor karst feature, one of hundreds of small cave entrances scattered across this stretch of Northern Ireland's limestone country. What pulls people off the main road and onto a wet forest track to find it is a few minutes of screen time from Game of Thrones, where this exact spot became the Hollow Hill, hideout of the Brotherhood Without Banners.

If you're ticking off Northern Ireland filming locations, Pollnagollum sits apart from the rest of the list both geographically and in character. Most of the famous spots, the Dark Hedges, Ballintoy Harbour, the Carrick-a-Rede area, cluster along the Causeway Coast and through the Antrim glens, a couple of hours northeast of here. Fermanagh is a different country within the country, closer to the border with the Republic than to Belfast, and Pollnagollum doesn't get the same coach traffic. That's part of what makes it worth the detour.

Why Pollnagollum Cave matters

There's no entrance fee, no visitor centre, no one selling tickets or merchandise. What draws people here is almost entirely the Hollow Hill connection, layered onto a genuinely interesting piece of local geology that would be worth a look even without the television history.

Fermanagh sits on a limestone belt riddled with sinkholes, underground streams, and cave systems, the same geology that produces the better-known Marble Arch Caves a short drive away. Pollnagollum is one of the smaller, wilder expressions of that landscape, unlit, unmanaged, and largely left to the weather. That rawness is exactly why it reads so well on camera. In the show it plays as a secret, half-hidden stronghold, a curtain of water hiding a passage into darkness. In person it's smaller than the lens suggests, true of almost every filming location once you stand in front of it, but the core image, a waterfall dropping over a cave mouth in dense conifer forest, is unmistakably the same shot.

Quick facts

• Location: Belmore Forest, near Enniskillen, County Fermanagh, Northern Ireland
• Postcode area: Enniskillen BT74 5BF
• Used in Game of Thrones as the Hollow Hill, hideout of the Brotherhood Without Banners
• Appears in the storyline where Arya Stark and Sandor Clegane are held captive
• No admission charge, no on-site facilities or staff
• Reached on foot via a forest track, not accessible by car

Getting there

Enniskillen is the natural base, with most routes to the cave running through or near the Marble Arch Caves Geopark, roughly half an hour's drive from town depending on which forestry entrance you use. There's no official car park at Pollnagollum itself. You'll generally leave the car at a forestry access point and walk in from there.

Signage is minimal, which is part of the point but also a genuine practical hazard. This isn't a site built for visitors, so go in with a downloaded map or a GPS track saved to your phone rather than trusting signposts that may or may not be there. A few online trip reports and GPX files exist from people who've made the walk before you, and it's worth tracking one down before you set off.

The approach runs through conifer plantation and open hillside, on tracks that hold water for much of the year. Fermanagh's rainfall is high even by Northern Irish standards, and the ground around the cave mouth tends to be soft or actively wet underfoot regardless of the month. Trainers will be soaked through within minutes. Proper waterproof boots, and ideally gaiters, are worth the extra weight in the boot of the car.

The layout and experience

What you're walking toward is a waterfall tumbling over the mouth of a cave cut into the hillside. The fall itself is modest, nothing like a dramatic cascade, but the setting carries it: dense forest closing in around a dark opening in the rock, water running over moss-covered limestone, very little ambient noise beyond the stream itself. It's easy to understand why a location scout stopped here and saw an underground refuge.

Most people stop at the cave mouth rather than going inside. The interior demands proper caving experience and equipment, and it's not somewhere to improvise your way into after watching a few episodes of television. Treat Pollnagollum as a viewpoint and a short, slightly rough forest walk, not an underground excursion, unless you're already equipped and experienced for wild caving in Fermanagh's karst systems.

History and background

The name Pollnagollum comes from the Irish, roughly "hole of the doves," a naming pattern repeated at cave sites across Irish karst country, including a better-known Pollnagollum in County Clare entirely unrelated to this one. The landscape here has been shaped over a very long span of time by water working its way through limestone, the same process responsible for the show caves at Marble Arch and for the blanket bog on Cuilcagh Mountain a short distance south.

Its screen history is considerably shorter. Game of Thrones used the location during its third season, which aired in 2013, for the Hollow Hill sequence, the underground camp where the Brotherhood Without Banners holds Arya Stark and Sandor Clegane. Northern Ireland supplied a huge share of the show's Westeros locations across its run, and Fermanagh's caves and forests gave the production a texture, damp, close, earthbound, that the coastal locations further north couldn't offer.

Best time to visit

Drier stretches of summer give you the best odds of a manageable walk in, though "dry" in this part of Fermanagh is a relative term. Even in July the ground around the cave mouth can be holding water from the week before. Avoid coming after heavy rain if you can help it, both because the track turns to a bog and because the stream crossing near the cave can rise quickly. Early or mid-afternoon on a weekday gives you the best chance of having the spot to yourself, which matters more here than at most attractions since there's no crowd management and very little space to spread out at the cave mouth itself.

Facilities and preparation

There is nothing here in the way of toilets, signage, mobile signal, or shelter. Bring water, wear boots rated for genuinely wet ground, and tell someone your route if you're walking alone, as you would for any unmarked forest trail. A walking pole helps on the steeper, looser sections. Phone coverage in parts of Belmore Forest is patchy enough that a pre-downloaded map is more reliable than live navigation.

Combining with nearby attractions

Marble Arch Caves is the obvious pairing, a short drive away and the opposite experience in almost every way: guided, lit, ticketed, and genuinely spectacular underground, with boat access through part of the system. Cuilcagh Mountain and its boardwalk trail up to the summit, sometimes called the Stairway to Heaven locally, sit within the same geopark and make a good full-day combination with Pollnagollum if you're building out a Fermanagh itinerary around karst landscapes. Enniskillen itself, with Enniskillen Castle and the lakes of Lower and Upper Lough Erne, works well as a base for the night before or after.

Practical tips

• Download an offline map or GPX track before you leave Enniskillen, since signage at the site is minimal and phone signal is unreliable in parts of the forest
• Wear waterproof boots regardless of the season, the ground around the cave mouth is wet most of the year
• Don't attempt to go inside the cave system without proper caving equipment and experience
• Check recent weather before setting out, as heavy rain raises the stream level and turns the approach track to mud
• Pair the visit with Marble Arch Caves or Cuilcagh Mountain to make the drive out from Enniskillen worth the time

FAQ

Is there an entrance fee for Pollnagollum Cave?
No. There's no admission charge and no staff on site, since it's an unmanaged natural feature rather than a managed attraction.

Can you go inside the cave?
You can walk up to the cave mouth, but going further in requires proper caving equipment and experience. It isn't set up for casual exploration.

How is Pollnagollum connected to Game of Thrones?
It was used in the show's third season as the Hollow Hill, the underground hideout of the Brotherhood Without Banners, the group that captures Arya Stark and Sandor Clegane.

Is there parking at the site?
No official car park exists at Pollnagollum itself. Visitors typically park at a forestry access point and walk in on foot.

How far is it from Enniskillen?
Roughly half an hour's drive, depending on which forest entrance you use, with the route generally passing near the Marble Arch Caves Geopark.