Best natural monuments around Onllwyn are situated in a region celebrated for its natural landscapes, including parts of the Brecon Beacons National Park and the renowned "Waterfall Country." While Onllwyn itself is known for its industrial heritage, the surrounding areas offer diverse natural attractions. These sites provide opportunities for exploring the dramatic Welsh landscape. This guide features 20 natural monuments in the vicinity.
Last updated: July 1, 2026
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Impressive waterfall. You can also walk well underneath it.
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The view you are most likely to see is from the top of the falls, to the side. There is a rock shelf that provides a good view for this view. In the summer you will also find people jumping off this shelf into the plunge pool below! There are other views that can be reached down a gully and then along a rough path that takes you to river level.
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Amazing place. Must visit in vacation. I am so excited to go there. Beautiful waterfall. https://www.my-milestonecard.com
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such a beautiful waterfall. Looks amazing and so peaceful weather. I loved it. https://www.my-milestonecard.com
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Sgwd yr Eira is the most impressive waterfall in the Pontneddfechan area. It is a high, broad, and powerful waterfall that resembles a curtain of water when it is in full flow. The fact that you can walk behind it just adds to the beauty of this amphitheatre you find yourself in. To get there, however, you have to take around 170 steps that go down the steep side of the valley to the river bed. If this worries you somewhat, just take your time when you go down and when you come back up. In addition, at the bottom, the path that goes to the waterfall is rocky and slippery, and if you walk behind the waterfall, it will be a bit wet, so a waterproof might be necessary.
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The Four Waterfalls Walk is my idea of heaven. Hidden away in a quiet corner of the Brecon Beacons, there is a famous waterfall trail that takes in four great waterfalls, it is located near the quaint village of Ystradfellte. The trail has stunning scenery, and the main access to it is from the car park at Porth yr Ogof, or the Cwm Porth car park, to give it its proper name. The Four Waterfalls are all spectacular in their own different ways, and they are Sgwd Clun-Gwyn, Sgwd Isaf Clun-Gwyn, Sgwd y Pannwr, and Sgwd yr Eira.
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With a bit of luck, you will see groups of brave people throwing themselves into the waterfall from above. Spectacular!
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Great views of the waterfall from here
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The region around Onllwyn, particularly within the Brecon Beacons' 'Waterfall Country', is home to several highly-regarded natural monuments. Among the most popular are Sgwd Yr Eira, famous for allowing visitors to walk behind its curtain of water, and Sgwd Gwladus Waterfall, where you can also often go behind the falls. Another favorite is Sgwd Uchaf Clun-Gwyn Waterfall, known for its dramatic upper falls and picturesque cascades.
The area offers several unique experiences. At Sgwd Yr Eira and Sgwd Gwladus Waterfall, you can walk directly behind the cascading water, offering an immersive perspective. For panoramic views, the Fan Gyhirych Summit Trig Point provides expansive vistas across the Fforest Fawr section of the Brecon Beacons, especially on clear days.
Yes, many of the natural monuments, especially the waterfalls, are suitable for families. Sgwd Yr Eira and Sgwd y Pannwr are listed as family-friendly. While some paths can be rocky and slippery, especially behind waterfalls, with appropriate footwear and care, they offer memorable experiences for all ages. Always check trail conditions before heading out with children.
The natural monuments around Onllwyn are excellent starting points for various outdoor activities. You can find numerous hiking trails, particularly around the 'Waterfall Country'. For example, there are several waterfall hikes, including routes to Henrhyd Falls. The area also offers gravel biking and running trails, allowing you to explore the diverse landscapes.
The region boasts significant geological interest. Moel Penderyn, for instance, is part of a biological and geological Site of Special Scientific Interest (SSSI). Additionally, the Coedydd Nedd a Mellte Special Area of Conservation (SAC) is a large and diverse example of old sessile oak wood, contributing to the rich biodiversity. The Gorsllwyn SSSI is also notable for its rare raised mire, an uncommon type of peatland in mid and South Wales.
While the main waterfalls are popular, Pen-Pych Waterfall in Rhondda Cynon Taf is often described as a beautiful, yet overlooked, natural monument. The footpath to it can be challenging, being narrow, uneven, and steep, especially after rain, but it offers a rewarding experience for those seeking a quieter natural escape.
The waterfalls are particularly impressive after rainfall, when the water flow is at its strongest. Spring and autumn offer lush greenery and vibrant foliage, respectively, making for picturesque visits. For mountain summits like Fan Gyhirych Summit Trig Point, clear conditions are best for enjoying the expansive views. Always check local weather forecasts before your visit, as paths can become slippery.
Given the terrain and potential for wet conditions, especially near waterfalls, sturdy walking boots with good grip are highly recommended. Waterproof clothing, including a jacket and trousers, is advisable, particularly if you plan to walk behind waterfalls like Sgwd Yr Eira or Sgwd Gwladus Waterfall, where you are likely to get wet.
Many trails within the Brecon Beacons National Park and around the natural monuments are dog-friendly. However, it's crucial to keep dogs on a lead, especially in areas with livestock or sensitive wildlife, and to follow the Countryside Code. Always clean up after your dog to help preserve the natural environment for everyone.
While Onllwyn itself is a small village, the surrounding areas, particularly near popular waterfall trailheads like Pontneddfechan, offer options for refreshments. You can often find pubs and cafes in nearby villages, providing places to eat and drink before or after your exploration of the natural monuments.
Visitors frequently praise the dramatic beauty and immersive experiences offered by the natural monuments. The ability to walk behind waterfalls, the powerful cascades, and the stunning views from summits are often highlighted. The komoot community has shared 18 photos and given 20 upvotes, reflecting the appreciation for these natural wonders and the rewarding feeling of completing the trails.
The accessibility varies. Some waterfall trails, like those leading to Sgwd Yr Eira, involve numerous steps and rocky, slippery paths, making them more suitable for intermediate hikers. Other areas might offer easier sections. For summits like Fan Gyhirych Summit Trig Point, the routes can be challenging. It's always best to check specific trail descriptions for difficulty ratings before setting out.


Extend your search for the best caves by checking out these guides of the top ones around Onllwyn: