Routes

Planner

Features

Updates

App

Login or Signup

Get the App

Login or Signup

Routes
Places to see
Natural Monuments
United Kingdom
Wales
South Wales

Old St Mellons

Top 10 Natural Monuments around Old St Mellons

Best natural monuments around Old St Mellons include a variety of ecological sites, historical features, and recreational green spaces. The area, a historic suburb of Cardiff, features ancient woodlands, tranquil lakes, and significant hills. These locations offer opportunities to observe diverse wildlife and explore historical Welsh landscapes. Old St Mellons is known for its hills, historical sites, and river features.

Best natural monuments around Old St Mellons

  • The most popular natural monuments is Twmbarlwm Hill and Iron Age hillfort,…

Last updated: July 1, 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.

Tip by

See hikes here

Send to Phone

Save

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 …

Tip by

Save

Sign up now to discover places like this

Get recommendations on the best single tracks, peaks, & plenty of other exciting outdoor places.

Sign up for free

Radyr Weir

Highlight • Structure

A pretty weir of the River Taff, the Radyr Weir runs today as a hydro power scheme and a focal point of Radyr town. Many wild salmon and sea trout …

Tip by

Save

Roath Park is one of Cardiff's most loved parks, it was recently awarded the prestigious Green Flag award to recognise its high quality and its importance to Cardiff.

In the …

Tip by

Save

Roath Park Rose Garden

Highlight • Natural

During the spring and summer months, Roath Park boasts an exceptional floral display.

The rose garden has been an attraction since the 1950s and in the 60s the Royal National …

Tip by

Save

Sign up for free to discover even more natural monuments around Old St Mellons.

Sign up for free

Already have an account?

Start today with a free account

Your next adventure awaits.

Login or Signup

Popular around Old St Mellons

Road Cycling Routes around Old St Mellons

MTB Trails around Old St Mellons

Gravel biking around Old St Mellons

Cycling around Old St Mellons

Running Trails around Old St Mellons

Hiking around Old St Mellons

Tips from the Community

Peter Turner
July 30, 2025, Roath Park Rose Garden

A huge garden with flowerbeds as far as the eye can see. The roses are currently in season and the variety and quality is outstanding. Thank you to all those who maintain this flower Paradise ❤️

0

0

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

1

0

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.

1

0

Grace Mulligan
November 23, 2024, Radyr Weir

The weir spans the River Taff, which flows directly through the heart of South Wales. It's a nice place to stop and refuel with picnic benches and a peaceful atmosphere.

1

0

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.

1

0

Indian restaurant

Translated by Google

0

0

The pretty Radyr Weir spans over the River Taff and is currently working as a hydropower scheme, providing energy locally. You may find wild salmon and sea trout near the weir, as well as cormorants and grey herons.

1

0

During the spring and summer months, Roath Park boasts an exceptional floral display. The rose garden has been an attraction since the 1950s and in the 60s the Royal National Rose Society recognised its importance and chose to plant award-winning roses there.

2

0

Frequently Asked Questions

What natural features can I explore around Old St Mellons?

Old St Mellons offers a diverse range of natural features. You can visit Radyr Weir on the River Taff, known for its hydro power scheme and wildlife like wild salmon and grey herons. Hendre Lake is a designated Site of Special Scientific Interest (SSSI) with diverse wildlife and tranquil scenery. Additionally, Roath Park Lake provides a peaceful setting with ducks, birds, and a lighthouse.

Are there historical natural monuments to visit near Old St Mellons?

Yes, the area is rich in history. Twmbarlwm Hill and Iron Age hillfort is a significant historical site featuring an Iron Age hill fort on its summit, offering a glimpse into ancient Welsh landscapes. Cath Cobb Woods is an ancient woodland, existing since before 1600, providing a valuable ecological site with unique plant and animal communities. The Cromlech in the grounds of Druidstone House also points to the deep historical heritage of the area, dating back over 2,000 years.

What are some family-friendly natural monuments in the area?

For families, Radyr Weir is a great spot to observe river wildlife. Roath Park Lake and the Scott Memorial Lighthouse is a popular choice, offering a peaceful walk, a cafe, and picnic spots. Nearby, the Roath Park Rose Garden boasts exceptional floral displays, especially during spring and summer, and is also family-friendly.

Are there any natural monuments with good viewpoints?

Absolutely. Twmbarlwm Hill and Iron Age hillfort offers wonderful views of the Severn Estuary from its 1,375-foot summit. Mynydd Machen Summit, at 1,188 feet, provides glorious panoramic views over Newport, Cardiff, and the Severn Estuary. Radyr Weir also offers pleasant river views.

Are there easy walks to natural monuments around Old St Mellons?

Yes, there are several easy walking options. Hendre Lake offers tranquil walks around its perimeter, suitable for nature enthusiasts. Beech Tree Park and Orchard Park also provide accessible green spaces for leisurely strolls. For more structured easy hikes, you can explore routes like the 'Boardwalk Through Reeds loop from Rumney' or the 'Riverside Park, Rumney loop from Rumney', which are part of the Easy hikes around Old St Mellons guide.

Where can I find parking near these natural monuments?

Parking is available at several locations. For Mynydd Machen Summit, there is plenty of free parking in Machen next to the village hall and library. Roath Park Rose Garden also has parking facilities nearby, making it convenient for visitors to Roath Park.

What outdoor activities can I do near the natural monuments?

The area around Old St Mellons is excellent for outdoor activities. You can enjoy hiking on various trails, including those around Hendre Lake or the more challenging ascent to Twmbarlwm Hill. Cycling is also popular, with routes like the 'Y Maerun Pub & Dining loop from Llanrumney'. For more options, check out the Hiking around Old St Mellons and Cycling around Old St Mellons guides.

Are the natural monuments around Old St Mellons dog-friendly?

Many natural monuments and green spaces in the Old St Mellons area are dog-friendly, offering opportunities for walks with your pet. Hendre Lake, Beech Tree Park, and Orchard Park are generally welcoming for dogs, provided they are kept under control. Always check local signage for specific rules regarding dogs, especially in nature reserves or protected areas.

When is the best time to visit the natural monuments around Old St Mellons?

The natural monuments around Old St Mellons can be enjoyed year-round. Spring and summer are ideal for experiencing the full floral display at the Roath Park Rose Garden and observing diverse wildlife at Hendre Lake. Autumn offers beautiful foliage, while winter walks can be peaceful, especially in ancient woodlands like Cath Cobb Woods, though some paths might be muddy.

What makes Radyr Weir a notable natural monument?

Radyr Weir is notable for its dual role as a natural feature and a functional hydro power scheme on the River Taff. It's a significant spot for wildlife observation, where you can often see wild salmon, sea trout, grey herons, and cormorants. It also serves as a focal point for the Radyr town, offering a peaceful atmosphere with picnic benches.

What is unique about Cath Cobb Woods?

Cath Cobb Woods is unique because it is an ancient woodland, meaning it has existed in Wales since before 1600. This long history has allowed for the development of complex and unique communities of plants, fungi, insects, and other microorganisms, making it a valuable ecological site. It offers a rare glimpse into historical Welsh landscapes and provides opportunities for undisturbed nature observation.

Can I go cycling near the natural monuments?

Yes, cycling is a popular activity in the region. There are various routes available, such as the 'Y Maerun Pub & Dining loop from Llanrumney' or 'The Route – Llanishen Reservoir loop from Pentwyn'. These routes allow you to explore the wider area and often pass by or near some of the natural monuments. For detailed cycling routes, refer to the Cycling around Old St Mellons guide.

Most popular routes around Old St Mellons

Road Cycling Routes around Old St Mellons

Most popular attractions around Old St Mellons

Places to see

Store rating

Get inspired with the komoot mobile app

With a free komoot account, you can easily find, customize, and navigate endless outdoor adventures.

or

Join komoot Now

Store rating

Explore more

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

YstradfellteMaescarCrayTawe-UchafLlywelLlangynidrThe Vale Of GrwyneyYstradgynlaisLlanfrynachCrickhowellGlyn TarellLlangattockGlynneathCymer And GlyncorrwgOnllwynTalybont-On-UskBlaengwrachSeven SistersLlanfihangel Cwmdu With Bwlch And CathedineResolvenBreconPembrokeshireTrallongMonmouthshireYscirLlangorsLlanddewLlanveynoePort EynonLlanrhidian LowerReynoldstonPenriceIlstonTalgarthLongtownHonddu IsafSwanseaLlangennith, Llanmadoc And CheritonRhossiliLlanigonGwernyfedBronllysLlanrhidian HigherFelin-FachPennardAbersychanCwmllynfellCarmarthenshireCraswallBlaenavonUpper KillayMichaelchurch EscleyCrynantBedwas Trethomas & MachenVale of GlamorganVanLisvaneCaerphillyRudryLlanbradachRhiwbinaGowertonGwaun-Cae-GurwenPenyrheol Trecenydd & EnerglynMaesycwmmerRadyr and MorganstownWhitchurchPentyrchPontprennauPontardaweCeredigionAber ValleyTongwynlaisHeathYstalyferaPengamPeterchurchGelligaerWalterstoneCockettSt. MargaretsLlandaff NorthCathaysPontllanfraithPentwynLlanishenCyncoedNelsonArgoedCefn FforestCilybebyllNewtonNeath Port TalbotPelennaAbbey DoreBishopstonTurnastoneVowchurchMumblesPen TranchBlackwoodPenmaenCrumlinClyne And MelincourtRhondda Cynon TafBargoedLlancilloBactonMawrBrynTenbySkettyKillayDunvantRowlstoneYnysdduHenllysCwmavonPenylanRoathNewbridgeGwynfi And CroeserwMargamBriton FerryTrevethinNew InnNeathDulasFairwaterMargam MoorsRisca WestRisca EastAbercarnCardiffCastleTownhillEwyas HaroldCoedffrancDyffryn ClydachTonnaBlaenhonddanLlanwrtyd WellsUplandsLlwchwrCwmbran CentralUpper CwmbranPonthirLlantarnamCroesyceiliogLlanyrafonPontymoilePontnewyddCaerphillyMarloes And St. BridesCrosskeysTai-BachPenderryAberavonPort TalbotSandfields EastKentchurchBaglan MoorsBaglanSandfields WestBaglan BayPantegBirchgroveCwmbrwlaBon-Y-MaenMynyddbachLandoreSt. ThomasLlangyfelachClydachKenderchurch

Nearby adventure guides

Things to Do around Pontprennau

background

Get ready to conquer new peaks

Sign up for Free

Explore
RoutesRoute plannerFeaturesHikesMTB TrailsRoad cycling routesBikepackingSitemap
Download the app
Follow Us on Socials

© komoot GmbH

Privacy Policy