Best natural monuments around Mawr are found in a community within the City and County of Swansea in South Wales. The area features rural farmland, open moorland, and is notably home to the Lliw Reservoirs Country Park. This landscape provides a tranquil escape amidst mountain scenery, offering a combination of natural beauty and ecological interest. Mawr's natural features include reservoirs, mountain summits, and historical sites.
Last updated: October 2, 2026
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The location of the castle above the valley of the Cennen is simply indescribably beautiful, especially when sun and clouds constantly change the lighting mood.
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Wow just wow, didn’t expect the cave below the castle !!!
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The River Loughor is a river in Wales that marks the border between Carmarthenshire & Swansea. The river is sourced from an underground lake at the Black Mountain emerging at the surface from Llygad Llwchwr, which translates from the Welsh as eye of the Loughor😀
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At just 440 metres Tair Carn Isaf is a modestly sized hill, but its prominence at the western end of the Black Mountain, high above the Amman Valley, affords extensive views over central south Wales, into Powys, west to the Preselis, and over the Gower Peninsula and Severn Estuary.
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Carreg Cennen Castle is erected sometime after 1284 by Baron John Giffard and his son on the site of an earlier Welsh fortification. In 1462, Carreg Cennen flies the Lancastrian flag. Taken on behalf of the Yorkist king Edward IV, it is slighted by pick and crowbar, ending its life as a stronghold. Carreg Cennen castle is spectacularly located on a great limestone crag about 90m above the river Cennen, offering views miles around.
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Ruin of a late thirteenth-century castle, on a limestone rock where there may already have been a fort in the Iron Age. The earliest castle was most likely the work of the dynasty of Welsh princes. The oldest found written mention of the castle dates "only" from 1248 when Rhys Fychan (died 1271), great-grandson of Lord Rhys, conquered the castle from the English. In 1277 the castle was captured by Edward I of England in his first campaign against Llewelyn ap Gruffudd of Gwynedd (died 1282).[1] The castle was briefly reconquered in 1282 and 1287. In 1282–83 Edward I completed his conquest of Wales and granted Carreg Cennen Castle in 1283 to his loyal supporter John Giffard (d. 1299), baron of Brimpsfield (Gloucestershire). The current castle was most likely built by Baron Giffard and his son John (died 1322), not too long after 1284. Being a resident of Ghent myself, I thought it was a nice fact that the castle was in the hands of John of Gaunt (yes, John of Gaunt), Duke of Lancaster, for a while in the 14th century. During the War of the Roses (1455-1485), Carreg Cennen Castle was initially in Lancaster hands, but was later conquered by the York supporters. In the late 18th century the castle became popular among amateur archaeologists and artists, with William Turner visiting the castle in 1798. In the 19th century the second Earl of Cawdor began restoration work on Carreg Cennen Castle. In 1932 the castle came under state management. In the 1960s the castle became the property of the Morris family, owners of the Castell Farm farm near the castle. Source: Wikipedia The castle can be visited 364 days of the year. Just not on Christmas Day. 9:30 am - 4:30 pm (from April to October until 5:00 pm) The ticket desk is located at the tea room / gift shop ("downstairs", where the parking is also located). In high season and on weekends, tickets can also be purchased near the entrance to the castle. Entrance prices range from £6.50 for adults, £4.00 for discount holders, to £20.00 for a family ticket.
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Tair Carn Isaf at 460m stands at the western end of the Brecon Beacons National Park. This position creates amazing views south over the Gower and out to the Bristol Channel and west towards Pembrokeshire. There are three stone cairns on the summit, one has a trig point.
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A beautiful view and many small plants to discover.
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Mawr is home to several significant natural monuments. The Carreg Cennen Castle offers historical insights and amazing viewpoints. For wildlife enthusiasts, the WWT Llanelli Wetland Centre provides extensive ponds and marshes to observe diverse bird species. Additionally, the Tair Carn Isaf Summit provides expansive views over central South Wales, the Gower, and the Bristol Channel.
The Lliw Reservoirs Country Park is a primary natural monument in Mawr, offering a tranquil escape with stunning mountain scenery. It features both the Upper and Lower Lliw Reservoirs, extensive walking routes for all abilities, and a rich biodiversity with rare plant and animal species. You can also discover beautiful hand-carved Welsh oak wildlife sculptures along the Lower Lliw Trail.
Yes, Mawr has natural monuments with historical significance. Carreg Cennen Castle, though a castle, is considered a natural monument due to its dramatic setting and offers a glimpse into 12th-century history. The Carreg Bica Standing Stone is a Bronze Age monument, and the landscape around the Lliw Reservoirs also bears traces of old quarries and coal mines, reflecting the region's industrial past.
The natural monuments around Mawr are rich in biodiversity. At the WWT Llanelli Wetland Centre, you can observe a wide array of bird species, from native herons to Caribbean flamingoes. The Lliw Reservoirs and their surroundings support diverse flora and fauna, including peregrine falcons, kestrels, ravens, wheatears, meadow pipits, skylarks, whinchats, red kites, and curlews. Keep an eye out for the hand-carved wildlife sculptures along the Lower Lliw Trail, depicting animals like rabbits, otters, and owls.
Absolutely. The Tair Carn Isaf Summit, at 460m elevation, provides extensive views over central South Wales, the Gower, and the Bristol Channel. The area around Carreg Cennen Castle also offers amazing viewpoints and picnic spots around its grounds. The Lliw Reservoirs themselves are set against a backdrop of stunning mountains, providing picturesque views throughout the year.
Beyond exploring the natural monuments themselves, the Mawr area offers a variety of outdoor activities. You can find numerous running trails, including routes like the 'Ystalyfera Iron Works loop' or 'River Tawe loop'. For cyclists, there are options like the 'Amman Valley Cycleway' or 'Swiss Valley Cycle Path'. Gravel biking is also popular, with routes such as the 'Lower Lliw Reservoir and Café – Mynydd Pysgodlyn loop'. For more details on these activities, you can explore the Running Trails around Mawr, Cycling around Mawr, and Gravel biking around Mawr guides.
Yes, the Lliw Reservoirs Country Park, a key natural monument, offers a variety of walking trails. These range from short, easy strolls around the reservoirs to longer, more challenging routes across open moorland, some extending over ten miles. A four-mile, well-surfaced path is also available, making it inclusive for wheelchairs and pushchairs. Popular routes include the loop from the Lower Lliw Reservoir to the Upper Lliw Reservoir.
Yes, several natural monuments cater to families. The WWT Llanelli Wetland Centre is explicitly family-friendly, offering engaging experiences with diverse bird species. The Lliw Reservoirs Country Park is also great for families, with easy walking paths, wildlife sculptures to discover, and opportunities for watersports. The inclusive four-mile path around the Lower Lliw Reservoir is suitable for pushchairs.
Yes, the Lliw Reservoirs Country Park offers good accessibility. There is a four-mile, well-surfaced path around the Lower Lliw Reservoir that is suitable for wheelchairs and pushchairs, allowing many visitors to enjoy the scenic beauty and wildlife sculptures.
The natural monuments around Mawr, particularly the Lliw Reservoirs, offer picturesque views throughout the year. Spring and summer are ideal for enjoying the full bloom of flora and active wildlife, as well as watersports. Autumn brings beautiful colours to the landscape, while winter can offer a tranquil, stark beauty, though some facilities or paths might be affected by weather.
Yes, the Lliw Reservoirs Country Park has facilities available. There is a café at the Lower Lliw Reservoir, which is a convenient spot for refreshments. Additionally, the Carreg Cennen Castle farm has a tea room with home cooking. The WWT Llanelli Wetland Centre also provides facilities for visitors.
The magical spot where the River Loughor emerges from its source is called Llygad Llwchwr, which translates to 'eye of the Loughor'. It's located at the Black Mountain, where the river emerges from an underground lake. Below the surface, there's a 1.2 km-long cave system.


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