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.
Last updated: July 1, 2026
Highlight • Historical Site
Tip by
Highlight • Viewpoint
Tip by
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
Highlight • Structure
Tip by
Highlight • Lake
Tip by
Highlight • Natural
Tip by
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
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
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
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
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.


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