Porth yr Ogof
Explore Porth yr Ogof, Wales' largest cave entrance, where the Afon Mellte river vanishes underground amidst the stunning Brecon Beacons.
Highlights
Must-see attractions
Social
From TikTok & Reddit
Best Time
Fewer crowds, more serene
Porth yr Ogof
Best Time
Fewer crowds, more serene
Highlights
Must-see attractions
Explore Porth yr Ogof, Wales' largest cave entrance, where the Afon Mellte river vanishes underground amidst the stunning Brecon Beacons.
"The cave itself is beautiful with a huge entrance with the river flowing straight into it."
waterproof gear is key! ☔
Pack waterproof clothing and sturdy, non-slip shoes. The cave can be wet and slippery, especially after rain.
Book a guided tour 🤝
For a safer and more informative experience, consider booking a caving trip with local guides.
Quick Facts
Rating
4.8 · 12 reviews
Type
Natural Feature
Highlights
Discover the most iconic attractions and experiences
The Grand Entrance
Cave Mouth
Witness the awe-inspiring, massive cave entrance where the Afon Mellte river dramatically disappears underground.
Behind the Waterfall
Inside the Cave
Experience the thrill of walking behind the cascading water, a unique perspective of this natural wonder.
The Letterbox Squeeze
Narrow Passage
Test your adventurous spirit by navigating the famous 'Letterbox' squeeze, a memorable caving challenge.
Plans like a pro.
Thinks like you
Planning Your Visit
Embrace the Elements
Accessibility & Amenities
Best Times
Insider Tips
from TikTok, Instagram & Reddit
waterproof gear is key! ☔
Pack waterproof clothing and sturdy, non-slip shoes. The cave can be wet and slippery, especially after rain. 
Book a guided tour 🤝
For a safer and more informative experience, consider booking a caving trip with local guides.
Check river levels 🌊
The Afon Mellte can flood, making the cave inaccessible or dangerous. Check local conditions before you go.
Parking fees apply 🅿️
There's a car park nearby, but it's not free. It's a short walk to the cave entrance.
Tips
from all over the internet
waterproof gear is key! ☔
Pack waterproof clothing and sturdy, non-slip shoes. The cave can be wet and slippery, especially after rain.
Book a guided tour 🤝
For a safer and more informative experience, consider booking a caving trip with local guides.
Check river levels 🌊
The Afon Mellte can flood, making the cave inaccessible or dangerous. Check local conditions before you go.
Parking fees apply 🅿️
There's a car park nearby, but it's not free. It's a short walk to the cave entrance.
Not for mobility issues 🚶♀️
The terrain is uneven and the cave requires navigating natural obstacles, making it unsuitable for wheelchairs.
What Travellers Say
Reviews Summary
Visitors rave about the spectacular, massive entrance of Porth yr Ogof, where the river disappears underground, and the unique experience of walking behind the waterfall. The 'Letterbox' squeeze is a thrilling challenge for adventurers. However, the site's natural state means it's not accessible for those with mobility issues and can be very wet and slippery, requiring careful preparation.
"A good size car park, not free and a short walk to the cave.
Definitely not for wheelchair users or people with mobility issues.
The cave itself is beautiful with a huge entrance with the river flowing straight into it."
Weekend Wildness
"Dr Who filming location.
But it was raining hard.
Very hard...
And the place was flooded."
Taf Williams
"Wonderful place to visit, luckily there are toilets,a shop. Also hot food and drinks are available from the Burgerpod, includes a vegetarian menu. Can be very busy especially in school holidays. Well worth a visit to this beautiful area. There is a campsite for tents and campervans at nearby Ystradvfellte."
Stewart Foster
What People Like
What People Dislike
Frequently Asked Questions
🚇 🗺️ Getting There
Porth yr Ogof is located in Ystradfellte, within the Brecon Beacons National Park. The nearest parking is a short walk away. Many visitors arrive by car, and it's a popular stop on scenic drives through the park. +1
Yes, there is a car park available near Porth yr Ogof. However, it is not free and requires a fee. From the car park, it's a short walk to the cave entrance.
Public transport options to Porth yr Ogof can be limited. While buses may serve nearby villages, it's often best to check local bus timetables in advance or consider it as part of a driving tour of the Brecon Beacons.
Porth yr Ogof is often visited as part of the Four Falls Trail or the Elidir Trail in the Brecon Beacons, which explore the 'Waterfall Country' and showcase several beautiful cascades. +2
The nearest village to Porth yr Ogof is Ystradfellte. It's a small community within the Brecon Beacons National Park, known for its natural beauty and waterfalls.
🎫 🎫 Tickets & Entry
No, Porth yr Ogof itself does not require an entrance ticket. It's a natural cave formation accessible to the public. However, parking nearby may incur a fee.
As a natural attraction, Porth yr Ogof is open 24/7. However, visiting during daylight hours is recommended for safety and visibility.
While children can visit, the cave's natural terrain and potential for wet conditions mean it's best suited for older, more adventurous children who can navigate uneven surfaces safely. Adult supervision is crucial.
Swimming directly in the cave entrance is generally not advised due to the strong current of the Afon Mellte and the slippery conditions. The focus is on exploring the cave itself.
While the cave is a natural site, there are facilities like toilets and a shop nearby. A 'Burgerpod' also offers hot food and drinks, including vegetarian options.
🎫 🏞️ Onsite Experience
Porth yr Ogof is renowned for its massive cave entrance, the largest in Wales, where the Afon Mellte river disappears underground. It's also known for the 'Letterbox' squeeze and the ability to walk behind a waterfall.
Wear waterproof clothing and sturdy, grippy footwear. The cave floor can be very slippery and wet. Consider bringing a change of clothes if you plan to explore thoroughly.
While an exciting adventure, Porth yr Ogof can be dangerous if not approached with caution. Slippery surfaces, strong currents, and potential flooding pose risks. Going with a guide is recommended for safety.
Yes, Porth yr Ogof offers fantastic photographic opportunities, especially of the grand entrance and the water features. Protect your camera from water spray.
The 'Letterbox' is a narrow, challenging passage within Porth yr Ogof that adventurers often squeeze through as part of the caving experience. It's a well-known feature for those exploring the cave network.
🍽️ 🍽️ Food & Dining
Yes, there's a 'Burgerpod' near Porth yr Ogof offering hot food and drinks, including vegetarian options. Nearby villages may also have pubs or cafes.
Picnicking is possible in the general area around Porth yr Ogof, but be mindful of the natural environment and take all litter with you. Designated picnic spots might be available near the car park.
The 'Burgerpod' near Porth yr Ogof is reported to offer vegetarian menu options, catering to different dietary needs.
📸 📸 Photography
The main cave entrance with the river flowing in is a prime spot. Capturing the water behind the falls and the 'Letterbox' squeeze offers unique perspectives.
Bring a waterproof camera bag or use a waterproof phone case. The cave can be damp and misty, so protecting your equipment from water spray is essential.
Yes, with good lighting and a steady hand, you can capture impressive shots inside the cave. Consider a tripod if you're aiming for longer exposures, but be mindful of the wet environment.
Daylight hours are best for natural light. Early mornings or late afternoons might offer softer light, but the dramatic nature of the cave is visible throughout the day.
Drone usage is generally restricted in National Parks to protect wildlife and the landscape. Always check the specific regulations for the Brecon Beacons National Park before flying a drone.
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from TikTok, Instagram & Reddit