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United Kingdom
Wales
South Wales

Bedwas Trethomas & Machen

Top 14 Natural Monuments around Bedwas Trethomas & Machen

Best natural monuments around Bedwas Trethomas & Machen are characterized by rolling hills, dense woodlands, and scenic riverside paths along the Rhymney River. This area, located in the Caerphilly Basin, offers numerous opportunities for outdoor activities and impressive views. The region features prominent hills, historical hillforts, and significant river features, providing a combination of natural beauty and historical significance. Visitors can explore a variety of natural landmarks, including summits with panoramic vistas.

Best natural monuments around Bedwas Trethomas & Machen

Last updated: May 3, 2026

Twmbarlwm Hill and Iron Age hillfort

Highlight • Historical Site

Twmbarlwm is a 1,375 foot (419 m) hill that is rich in beauty, history and folklore. From the summit, you are afforded wonderful views of the Severn Estuary. There is an Iron Age hill fort on the summit, too.

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Mynydd Machen Summit

Highlight • Viewpoint

Mynydd Machen is a 1,188-foot (362 m) hill in South Wales which affords glorious views over Newport, Cardiff, Steep Holm, Flat Holm, Brean Down, and the Severn Estuary. The summit …

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Garth Summit

Highlight • Viewpoint

Stunning little hill with commanding views just outside Cardiff with a trig pointed summit. It is a UK listed Marilyn.

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Giant's Bite

Highlight • Viewpoint

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 …

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Trig point at Mynydd Twyn-glas summit

Highlight • Natural Monument

Mynydd Twyn-glas is a sprawling 472-metre-high mountain extending into Caerphilly and Torfaen county boroughs in South Wales. It lies southwest of Pontypool, west of Cwmbran and east of Newbridge and …

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Peter Turner
July 9, 2025, Mynydd Machen Summit

Nice ascent from Crosskeys, but watch out for very overgrown pathways on the Machen side. Great views from the top!

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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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Twmbarlwm is a prominent hill and archaeological site located near the town of Cwmcarn in South Wales. It is part of the Caerphilly County Borough and is known for both its natural beauty and historical significance. Here are some key points about Twmbarlwm: Key Features: Hillfort: Twmbarlwm is home to the remains of an ancient hillfort, dating back to the Iron Age. The fortifications, which include earthworks and ramparts, suggest it was a significant settlement during that period. Celtic Connections: The name "Twmbarlwm" is thought to derive from Welsh, with "Twm" being a diminutive of "Tudur" and "barlwm" referring to a mound or hill. The site is associated with Celtic history and mythology. Natural Beauty: The hill offers stunning views of the surrounding landscape, including the nearby valleys and mountains. It is a popular destination for walkers, hikers, and outdoor enthusiasts. Archaeological Significance: Twmbarlwm has been the subject of various archaeological studies, which have revealed insights into ancient settlement patterns, defensive strategies, and daily life in prehistoric Wales. Access: The hill is accessible via footpaths, making it a popular spot for local residents and visitors. There are several trails that lead to the summit, offering a rewarding hike. Cultural Heritage: The site is connected to local folklore and legends, contributing to its cultural significance in the region. Visiting: If you plan to visit Twmbarlwm, it’s a good idea to check local resources or hiking guides for specific trails and information about the area. The site is a great way to experience the natural beauty and historical richness of South Wales.

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A small summit above Risca. Known locally as the "Twmp" (the hump), the pimple or the nipple, due to the shape of the mound on the summit.

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Zoe Evans
February 12, 2023, Giant's Bite

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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Cracking local walk, gain height for amazing views and walk over to twmbarlwm

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plenty of free parking in Machen next to the village hall and library

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Twmbarlwm is a 1,375 foot (419 m) hill that is rich in beauty, history and folklore. From the summit, you are afforded wonderful views of the Severn Estuary. There is an Iron Age hill fort on the summit, too.

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Frequently Asked Questions

What are some prominent natural monuments in the Bedwas Trethomas & Machen area?

The region boasts several significant natural monuments. Notable examples include Twmbarlwm Hill and Iron Age hillfort, known for its historical significance and views of the Severn Estuary, and Mynydd Machen Summit, offering glorious vistas over Newport, Cardiff, and the Bristol Channel. Another popular spot is Garth Summit, which provides commanding views just outside Cardiff.

Do any natural monuments in the area have historical significance?

Yes, Twmbarlwm Hill and Iron Age hillfort is a prime example. This 419-meter-high hill is not only a natural landmark but also home to a well-preserved Iron Age hillfort, offering a glimpse into ancient history alongside its natural beauty.

Where can I find the best panoramic views of the surrounding landscape?

For breathtaking panoramic views, consider visiting Mynydd Machen Summit, which provides extensive vistas over Newport, Cardiff, and the Severn Estuary. Twmbarlwm Hill also offers wonderful views of the Severn Estuary from its summit. Additionally, Garth Summit is known for its commanding views.

Are there hiking trails near these natural monuments?

Yes, the area is excellent for hiking. You can find various trails, including easy options like the 'St John's Church, Machen – Mynydd Machen Summit loop from Machen' or more moderate routes such as the 'Mynydd Machen Summit – St John's Church, Machen loop from Machen'. For a comprehensive list of hiking routes, visit the Hiking around Bedwas Trethomas & Machen guide.

What kind of wildlife can be observed near the natural monuments?

The natural areas, especially around river features like Radyr Weir, are home to diverse wildlife. You might spot wild salmon, sea trout, grey herons, and cormorants. The woodlands and hills also support varied flora and fauna, with bluebell displays being a highlight in May.

Are there any family-friendly natural attractions in the area?

Yes, Radyr Weir is considered family-friendly, offering a peaceful atmosphere and opportunities to observe river wildlife. The wider Cwmcarn Forest, though slightly outside the immediate area, also provides a range of walks suitable for all abilities, including gentle lakeside strolls.

What are the typical terrain and elevation gains for trails around these natural monuments?

The landscape is characterized by rolling hills and dense woodlands. Trails can range from moderate ascents on hills like Mynydd Machen Summit (362 meters) and Twmbarlwm Hill (419 meters) to easier riverside paths. Many routes involve gravel trails and woodland paths. For specific elevation details, refer to individual tour descriptions within the Hiking around Bedwas Trethomas & Machen guide.

Is there parking available for visiting these natural monuments?

Yes, for Mynydd Machen Summit, there is plenty of free parking available in Machen next to the village hall and library. Parking facilities for other natural monuments can often be found in nearby villages or designated trailheads.

What is the best season to visit for wildflowers or autumn foliage?

Spring is ideal for observing wildflowers, with bluebell displays being particularly vibrant in May, especially in wooded areas like Cwmcarn Forest. For stunning autumn foliage, the dense woodlands throughout the Bedwas Trethomas & Machen area offer picturesque scenery as leaves change color.

Are there any natural features beyond hills and rivers to explore?

Beyond the prominent hills and the Rhymney River, you can explore unique features like the Giant's Bite. This dramatic gap in the skyline, high above the A470, offers incredible views of the Taff and Cynon valleys and showcases a landscape healing from past quarrying, now supporting diverse native flowering grassland species.

Can I find running trails near the natural monuments?

Yes, the area offers various running trails. You can find routes ranging from moderate to difficult, such as the 'View of Machen – Winding Forest Gravel Trails loop from Machen' or longer, more challenging runs like the 'Woodland Trail – Mynydd Machen Summit loop from Machen'. Explore more options in the Running Trails around Bedwas Trethomas & Machen guide.

What do visitors enjoy most about the natural monuments in this region?

Visitors frequently appreciate the combination of challenging walks and rewarding panoramic vistas. The historical dimension, particularly at sites like Twmbarlwm Hill and Iron Age hillfort, also adds to the appeal. The opportunity to experience the local landscape, observe wildlife, and enjoy the changing seasons in the rolling hills and dense woodlands is highly valued.

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Extend your search for the best caves by checking out these guides of the top ones around Bedwas Trethomas & Machen:

MaescarYstradfellteCrayLlywelTawe-UchafLlangynidrLlanfrynachThe Vale Of GrwyneyYstradgynlaisGlyn TarellOnllwynGlynneathBlaengwrachCymer And GlyncorrwgTalybont-On-UskSeven SistersCrickhowellLlangattockLlanfihangel Cwmdu With Bwlch And CathedineResolvenBreconYscirPembrokeshireTrallongLlanddewSwanseaMonmouthshirePort EynonIlstonLlangorsLlanveynoeLlangennith, Llanmadoc And CheritonRhossiliPenriceTalgarthLlanrhidian LowerReynoldstonHonddu IsafLongtownLlanrhidian HigherLlanigonGwernyfedBronllysPennardFelin-FachUpper KillayCarmarthenshireBlaenavonGowertonCraswallCrynantAbersychanCwmllynfellMichaelchurch EscleyVale of GlamorganBishopstonMumblesCaerphillyVanRudryCockettLisvaneLlanbradachMaesycwmmerRhiwbinaPontardawePenyrheol Trecenydd & EnerglynPentyrchYstalyferaWhitchurchRadyr and MorganstownAber ValleyGwaun-Cae-GurwenTongwynlaisGelligaerPontprennauPeterchurchWalterstoneHeathPontllanfraithCeredigionSt. MargaretsNelsonPengamCilybebyllArgoedCefn FforestNewtonNeath Port TalbotDunvantSkettyKillayPelennaAbbey DoreVowchurchTurnastonePenmaenBlackwoodCrumlinCathaysLlandaff NorthRhondda Cynon TafCyncoedPentwynLlanishenLlancilloOld St MellonsBargoedBactonBrynClyne And MelincourtPen TranchYnysdduRowlstoneCwmavonNewbridgeMawrMargamTenbyNeathBriton FerryDulasMargam MoorsRisca WestHenllysRisca EastAbercarnGwynfi And CroeserwRoathPenylanTownhillCastleDyffryn ClydachEwyas HaroldCoedffrancMarloes And St. BridesTonnaBlaenhonddanLlanwrtyd WellsNew InnTrevethinLlwchwrUplandsCaerphillyFairwaterCrosskeysCardiffTai-BachPenderryPort TalbotSandfields EastAberavonKentchurchSandfields WestBaglan MoorsBaglanBaglan BayPonthirCroesyceiliogUpper CwmbranCwmbran CentralLlantarnamPontymoilePontnewyddLlanyrafonBirchgroveLandoreCwmbrwlaBon-Y-MaenSt. ThomasMynyddbachLlangyfelachClydachKenderchurch

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