Natural monuments around Trehafod offer diverse outdoor exploration opportunities within the Rhondda Valley. The area features distinctive natural formations and tranquil parks, reflecting its industrial past and subsequent landscape restoration. Visitors can explore sites that provide views of the Taff and Cynon valleys, alongside areas known for their wildlife and walking routes. These natural attractions contribute to the region's appeal for outdoor activities.
Last updated: July 1, 2026
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The Garth has a nice flat top with views across the valleys. Lots of sheep grazing too (March). Also a number of mounds provide some cover from the wind if a break is in order
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High above the A470 to the north of Quaker’s Yard, the Giant’s Bite is a dramatic gap in the skyline quarried from the ridge top at the former Cefn Glas mine and quarry. ❤️👌 The site was intensively grazed up to the mid-1990s when a large belt of native trees were planted on the lower slopes. These trees are now maturing and have helped to heal the visible mining scares. The shales forming the upper soil horizons support a wide variety of native flowering grassland species including wild strawberry, cowslip, foxglove and wild thyme, and the site is increasingly becoming re-vegetated by scrub species. Incredibly Fine views of the Taff and Cynon valleys are afforded from the summit ridge, while the line of the former Glamorganshire Canal is also discernible.
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We walked miles. Up to the waterfall on Gillies trail, followed the path up onto the rocky and then to the trig point on Twyn Brynbychan, above the cynnon valleys. Enjoyed a breather on top, before trekking around the back forestry where you can see Aberfan and Merthyr Vale and headed over to the bronze age sight before descending down to Cwmaman and back to the car.
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Cefn Eglwysilan is a hill in South Wales, the twin 1,253 feet (382 m) summits of which lie just over one mile (2 km) east of Pontypridd in Rhondda Cynon Taf county borough. Its eastern side lies within the community of Aber Valley in Caerphilly county borough. Like neighbouring Mynydd Eglwysilan, the hill is named after the hamlet of Eglwysilan, the church here being dedicated to an obscure saint Ilan. A wireless transmission station is sited on the more northerly of the two summits (at OS grid ref ST 099911). The southerly one is crowned by a trig point. It is a UK listed Marilyn.
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Stunning little hill with commanding views just outside Cardiff with a trig pointed summit. It is a UK listed Marilyn.
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Beautiful little hill on the outskirts of Cardiff with a trig pointed summit and commanding views. Lovely place to catch a sunrise/set.
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The Rocking Stone or "Y Maen Chwyf" in Welsh is a glacial boulder remaining from the Ice Age. It formed the central point for a "Gorsedd" or "Gathering of Bards" in 1814, which was organised by stonemason, Edward Williams, known as "Iolo Morganwg". The Gorsedd Circle of smaller stones was constructed in 1849 by Evan Davies, Bardic name "Myfyr Morganwg" and has often been used for Bardic gatherings, and as a focal point for other public occasions.
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The Rocking Stone ('Y Maen Chwyf' in Welsh) is a glacial boulder left over from when ice sheets covered these lands. The stone circle that surrounds the stone was constructed in 1849 by Evan Davies. The site has often been used for Bardic gatherings and public events.
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Trehafod offers a variety of natural features. You can visit the Giant's Bite, a dramatic gap in the skyline with fine views of the Taff and Cynon valleys. Other notable sites include Garth Summit, offering commanding views, and Cefn Eglwysilan Trig Point, a hill with twin summits. Barry Sidings Countryside Park, known locally as "the lakes," provides a tranquil retreat with nature paths and a small waterfall.
For exceptional views, head to the summit ridge of Giant's Bite, which offers incredible panoramas of the Taff and Cynon valleys. Garth Summit is also highly recommended for its commanding views just outside Cardiff, and Cefn Eglwysilan Trig Point provides great vistas from its southerly summit.
Yes, Barry Sidings Countryside Park is a popular destination for families and dog walkers, featuring nature paths, two ponds, and a small waterfall. The Rocking Stone and the Gorsedd Circle is also considered family-friendly, offering an interesting historical and natural site to explore.
At Barry Sidings Countryside Park, you can observe a variety of wildlife including ducks, carp, and frogs in its two ponds. The lower slopes of Giant's Bite support diverse native flowering grassland species like wild strawberry, cowslip, foxglove, and wild thyme, and scrub species are also re-vegetating the site.
Yes, Giant's Bite is a striking feature that was quarried from the ridge top of the former Cefn Glas mine, showcasing the region's industrial past and subsequent landscape restoration. The Rocking Stone is a glacial boulder dating back to the Ice Age and has historical significance as a focal point for Bardic gatherings.
Absolutely. There are several hiking opportunities around Trehafod. You can find routes like the 'Barry Sidings Café – Aberfan Memorial Cairn loop from Trehafod' or shorter 'Hiking loop from Trehafod' which are rated easy to moderate. For more options, explore the Hiking around Trehafod guide.
Beyond hiking, the area around Trehafod is excellent for cycling. You can find various routes for both gravel biking and road cycling. Check out the Gravel biking around Trehafod guide or the Road Cycling Routes around Trehafod guide for detailed routes and difficulty levels.
The natural monuments around Trehafod can be enjoyed year-round. Spring and summer are ideal for seeing the diverse native flowering grassland species at sites like Giant's Bite and enjoying the lush greenery. Autumn offers beautiful foliage, while winter provides crisp views, especially from the higher summits, though some paths might be muddy.
Visitors frequently praise the stunning views from summits like Garth Summit and Giant's Bite. The tranquility and natural beauty of places like Barry Sidings Countryside Park are also highly valued, especially for walks and family outings. The area's blend of natural formations and restored landscapes, often with historical context, is a significant draw.
For a more extensive walk, consider exploring the areas around Twyn Brynbychan Trig Point, which offers routes leading to waterfalls and across forestry with views of the Cynon valleys. The paths around Cefn Eglwysilan Trig Point also provide opportunities for longer hikes with rewarding summit views.
Yes, Barry Sidings Countryside Park, often called "the lakes," is a serene natural retreat largely situated within Trehafod. It offers a peaceful environment with its two ponds, nature paths, and a small waterfall, making it perfect for quiet walks and relaxation.


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