Best natural monuments around Trealaw are found within the Rhondda Valley, an area characterized by its natural beauty and historical significance. The landscape features reclaimed industrial sites, prominent hills, and dramatic geological formations. These sites offer opportunities to explore the region's diverse natural features and panoramic viewpoints. The area provides a blend of natural exploration and historical connections.
Last updated: July 1, 2026
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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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Wow! Tarren y Bwllfa looms large over the valley below. It is one of Britain's most Southerly glacial cwms. Stunning views of the Brecon Beacons and the former industrial landscape nearby.
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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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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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The Rocking Stone or “Y Maen Chwyf” in Welsh is a glacial boulder dating back to the Ice Age. It was a focal point of the “Gathering of Bards” organised by stonemason Edward Williams in 1814.
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The Rocking Stone in Pontypridd is set within the middle of a fake Druidic stone circle, it's not prehistoric.
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The Trealaw area offers diverse natural features. You can visit Tarren y Bwllfa, one of Britain's most southerly glacial cwms, offering stunning views. Another highlight is the impressive Pen-Pych Waterfall, one of the highest in Wales with a 21-meter drop, resembling an Icelandic landscape. Additionally, Cwm Clydach Country Park, a reclaimed colliery site, features two lakes, a plunge pool, and a 'secret' mini-waterfall after heavy rainfall.
Yes, the region blends natural beauty with historical significance. The Rocking Stone and the Gorsedd Circle is a glacial boulder dating back to the Ice Age, which became a focal point for Bardic gatherings. The Trealaw Cross, a prominent white cross on the mountainside, was created in 2005 as a resting place and has become a significant local landmark with a meaningful connection to the community.
For breathtaking vistas, head to Tarren y Bwllfa, which provides expansive views of the Brecon Beacons and the surrounding industrial landscape. Giant's Bite offers fine views of the Taff and Cynon valleys from its ridge-top position. The summit of Pen-Pych Mountain also provides panoramic views over the Rhondda Fawr Valley and towards the Rhigos Mountain.
Cwm Clydach Country Park is a haven for wildlife, boasting rich biodiversity. You can spot wildflowers, fungi, lichens, reptiles, and various bird species including kingfishers, coots, moorhens, little grebes, herons, buzzards, red kites, and ravens. It's an excellent spot for birdwatching in a peaceful woodland setting.
Absolutely. Cwm Clydach Country Park is ideal for families, offering extensive trails suitable for walks and opportunities to observe nature. The Rocking Stone and the Gorsedd Circle is also considered family-friendly, providing an interesting historical and natural site to explore.
The Trealaw area is excellent for various outdoor activities. You can enjoy easy hikes, such as the 'Clydach Lakes loop' or the 'Top Lake, Clydach Vale' route, which are part of the Easy hikes around Trealaw guide. For cyclists, there are road cycling routes like the 'Rhigos Climb Viewpoint' loop, detailed in the Road Cycling Routes around Trealaw guide, and gravel biking options like the 'Rhigos Mountain Fire Roads' loop, found in the Gravel biking around Trealaw guide.
The difficulty varies. Cwm Clydach Country Park offers extensive, generally easy trails. However, reaching the Trealaw Cross can involve a 'scramble' up the mountainside. The hike to Pen-Pych Waterfall and its summit can be steep and uneven in places, offering a more adventurous experience. Highlights like Cefn Eglwysilan Trig Point and Twyn Brynbychan Trig Point typically involve intermediate-level walks to reach their summits.
Pen-Pych Waterfall and Mountain is often described as a 'hidden gem' for those seeking a rewarding natural experience away from more crowded tourist spots. It offers impressive cascades and panoramic views that are well worth the adventurous hike. Cwm Clydach Country Park also features a 'secret' mini-lake and waterfall that appear after heavy rainfall, adding to its charm.
The area showcases interesting geological formations. Tarren y Bwllfa is notable as one of Britain's most southerly glacial cwms, a bowl-shaped depression formed by glacial erosion. The Rocking Stone is a glacial boulder, a remnant from the Ice Age. Pen-Pych Waterfall, with its 21-meter drop, cascades over sedimentary rock, highlighting the region's geological structure.
Visitors frequently appreciate the stunning views, such as those from Tarren y Bwllfa and Giant's Bite, which offer incredible panoramas of the valleys and distant mountains. The transformation of industrial landscapes into thriving natural spaces, like Cwm Clydach Country Park, is also highly valued. Many enjoy the blend of natural exploration with the rich local history and the sense of discovery found in places like Pen-Pych Waterfall.
Yes, the area features several prominent trig points and summits. You can hike to the Cefn Eglwysilan Trig Point, located on one of the hill's twin summits, which is also a UK listed Marilyn. Another summit with a trig point is Twyn Brynbychan Trig Point, offering views above the Cynon valleys. Pen-Pych Mountain also provides a rewarding summit experience with panoramic views.
Yes, Cwm Clydach Country Park is a prime example of nature's reclamation, situated on the site of a former colliery. This 166-acre park has been transformed from an industrial landscape into a 'nature-lovers' paradise,' showcasing how nature can thrive after human intervention. Similarly, the area around Giant's Bite, a former mine and quarry, has seen significant re-vegetation with native trees and flowering grassland species.


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