# List of scheduled monuments in Merthyr Tydfil County Borough

Merthyr Tydfil County Borough has 43 scheduled monuments. The prehistoric scheduled sites include many burial cairns and several defensive enclosures. The Roman period is represented by a Roman Road. The medieval periods include two inscribed stones, several house platforms and two castle sites. Finally the modern period has 14 sites, mainly related to Merthyr's industries, including coal mining, transportation and iron works. Almost all of Merthyr Tydfil was in the historic county of Glamorgan, with several of the northernmost sites having been in Brecknockshire.
Scheduled monuments have statutory protection. The compilation of the list is undertaken by Cadw Welsh Historic Monuments, which is an executive agency of the National Assembly of Wales. The list of scheduled monuments below is supplied by Cadw with additional material from RCAHMW and Glamorgan-Gwent Archaeological Trust.

## Scheduled monuments in Merthyr Tydfil County Borough

| Name | Site type | Community | Location | Details | Historic County | Period | SAM No & Refs |
| Gelligaer Standing Stone | Standing stone | Bedlinog | 51°43′20″N 3°17′58″W﻿ / ﻿51.7221°N 3.2994°W﻿ / 51.7221; -3.2994﻿ (Gelligaer Common Standing Stone), SO103034 | A 2 m (6.6 ft) high stone on open moorland. Probably Bronze Age and with the possible remains of a Bronze Age burial alongside. An inscription on the stone, now mostly illegible, is described as either post-Roman/Early Christian or Early Medieval. | Glamorganshire | 1.1PrehistoricEarly Medieval | GM221 |
| Coed Cae Round Cairns | Round cairn | Bedlinog | 51°41′21″N 3°18′46″W﻿ / ﻿51.6892°N 3.3127°W﻿ / 51.6892; -3.3127﻿ (Coed Cae Round Cairns), ST093997 | Located in a cairnfield with at least 19 stony mounds, the scheduling consists of a group of eight Bronze Age burial cairns. | Glamorganshire | 1.3PrehistoricBronze Age | GM271 |
| Gelligaer Common Round Cairns | Round cairn | Bedlinog | 51°43′16″N 3°18′03″W﻿ / ﻿51.7211°N 3.3007°W﻿ / 51.7211; -3.3007﻿ (Gelligaer Common Round Cairns), SO102032 | A group of eleven Bronze Age burial cairns. | Glamorganshire | 1.3PrehistoricBronze Age | GM220 |
| Carn Castell y Meibion ring cairn | Ring cairn | Troed-y-rhiw | 51°43′07″N 3°23′52″W﻿ / ﻿51.7185°N 3.3979°W﻿ / 51.7185; -3.3979﻿ (Carn Castell y Meibion ring cairn), SO035031 | A ring cairn, possibly dating to the Bronze Age, with an 8 m (26 ft) diameter and surrounded by a 3 m (9.8 ft) wide stony ring bank. | Glamorganshire | 1.3Prehistoric Bronze Age | GM586 |
| Brynbychan Round Cairn | Round cairn | Merthyr Vale, (also Mountain Ash), (see also Rhondda Cynon Taff) | 51°40′52″N 3°21′23″W﻿ / ﻿51.6812°N 3.3564°W﻿ / 51.6812; -3.3564﻿ (Brynbychan Round Cairn), ST063989 | A Bronze Age circular cairn with a diameter of 18 m (59 ft). There is an OS triangulation pillar on the site. | Glamorganshire | 1.3Prehistoric Bronze Age | GM286 |
| Cefn Merthyr Round Cairns | Cairnfield | Merthyr Vale | 51°41′32″N 3°19′43″W﻿ / ﻿51.6922°N 3.3287°W﻿ / 51.6922; -3.3287﻿ (Cefn Merthyr Round Cairns), SO082001 | | Glamorganshire | 1.3Prehistoric | GM272 |
| Morlais Hill ring cairn | Ring cairn | Pant | 51°46′39″N 3°22′29″W﻿ / ﻿51.7774°N 3.3747°W﻿ / 51.7774; -3.3747﻿ (Morlais Hill ring cairn), SO052096 | | Glamorganshire | 1.3Prehistoric | GM563 |
| Tir Lan round barrow cemetery | Round barrow | Treharris | 51°41′09″N 3°18′36″W﻿ / ﻿51.6857°N 3.31°W﻿ / 51.6857; -3.31﻿ (Tir Lan round barrow cemetery), ST095993 | The remains of six Bronze Age round barrows, three to the north-west and three to the south-east of Tir Lan farm. All six remain substantially intact despite being reduced by ploughing in the past. | Glamorganshire | 1.3Prehistoric | GM270 |
| Garn Las Earthwork | Round cairn | Troed-y-rhiw, (also Aberdare), (see also Rhondda Cynon Taf) | 51°43′29″N 3°24′26″W﻿ / ﻿51.7248°N 3.4073°W﻿ / 51.7248; -3.4073﻿ (Garn Las Earthwork), SO028038 | The remains a circular burial cairn measuring 14 m (46 ft) in diameter, probably dating to the Bronze Age. | Glamorganshire | 1.3PrehistoricBronze Age | GM236 |
| Merthyr Common Round Cairns | Round cairn | Troed-y-rhiw | 51°43′46″N 3°20′09″W﻿ / ﻿51.7295°N 3.3357°W﻿ / 51.7295; -3.3357﻿ (Merthyr Common Round Cairns), SO078042 | A group of six Bronze Age burial cairns ranging from 5 to 19 m (16 to 62 ft) in diameter. | Glamorganshire | 1.3Prehistoric | GM222 |
| Carn Ddu platform cairn | Platform Cairn | Vaynor | 51°48′13″N 3°23′59″W﻿ / ﻿51.8037°N 3.3998°W﻿ / 51.8037; -3.3998﻿ (Carn Ddu platform cairn), SO035125 | | Glamorganshire | 1.3Prehistoric | GM570 |
| Cefn Cil-Sanws ring cairn | Ring cairn | Vaynor | 51°47′15″N 3°24′58″W﻿ / ﻿51.7875°N 3.4162°W﻿ / 51.7875; -3.4162﻿ (Cefn Cil-Sanws ring cairn), SO024108 | | Glamorganshire | 1.3Prehistoric | GM567 |
| Cefn Cil-Sanws, Cairn on SW side of | Round Cairn | Vaynor | 51°46′43″N 3°24′53″W﻿ / ﻿51.7785°N 3.4147°W﻿ / 51.7785; -3.4147﻿ (Cefn Cil-Sanws, Cairn on SW side of), SO024098 | | Brecknockshire | 1.3Prehistoric | GM599 |
| Coetgae'r Gwartheg barrow cemetery | Round cairn | Vaynor | 51°47′37″N 3°25′08″W﻿ / ﻿51.7935°N 3.419°W﻿ / 51.7935; -3.419﻿ (Coetgae'r Gwartheg barrow cemetery), SO022114 | | Glamorganshire | 1.3Prehistoric | GM568 |
| Garn Pontsticill ring cairn | Ring cairn | Vaynor | 51°47′48″N 3°22′30″W﻿ / ﻿51.7966°N 3.375°W﻿ / 51.7966; -3.375﻿ (Garn Pontsticill ring cairn), SO052117 | | Glamorganshire | 1.3Prehistoric | GM569 |
| Dyke 315m E of Tyla-Glas | Ditch | Bedlinog | 51°42′12″N 3°17′15″W﻿ / ﻿51.7033°N 3.2876°W﻿ / 51.7033; -3.2876﻿ (Dyke 315m E of Tyla-Glas), SO111012 | The remains of a later prehistoric/medieval dyke with a clearly defined bank and ditch running east-west across a ridge top. The 3 m (9.8 ft) wide ditch is 1.5 m (4.9 ft) deep at its east end. | Glamorganshire | 1.5Prehistoric | GM260 |
| Cefn Cil-Sanws Defended Enclosure | Enclosure - Defensive | Vaynor | 51°46′47″N 3°24′38″W﻿ / ﻿51.7796°N 3.4105°W﻿ / 51.7796; -3.4105﻿ (Cefn Cil-Sanws Defended Enclosure), SO027099 | | Brecknockshire | 1.5Prehistoric | GM600 |
| Enclosure East of Nant Cwm Moel | Enclosure - Defensive | Vaynor | 51°47′32″N 3°23′38″W﻿ / ﻿51.7922°N 3.394°W﻿ / 51.7922; -3.394﻿ (Enclosure East of Nant Cwm Moel), SO039113 | | Glamorganshire | 1.5Prehistoric | GM518 |
| Enclosure on Coedcae'r Ychain | Enclosure - Defensive | Vaynor | 51°47′29″N 3°25′00″W﻿ / ﻿51.7915°N 3.4167°W﻿ / 51.7915; -3.4167﻿ (Enclosure on Coedcae'r Ychain), SO023112 | | Glamorganshire | 1.5Prehistoric | GM519 |
| Gelligaer Common Roman Road | Road | Bedlinog | 51°43′21″N 3°18′03″W﻿ / ﻿51.7226°N 3.3007°W﻿ / 51.7226; -3.3007﻿ (Gelligaer Common Roman Road), SO102034 | | Glamorganshire | 2Roman | GM556 |
| Nant Crew Inscribed Stone (now in St John's Church, Cefn Coed ) | Standing stone | Vaynor | 51°45′46″N 3°24′13″W﻿ / ﻿51.7628°N 3.4035°W﻿ / 51.7628; -3.4035﻿ (Nant Crew Inscribed Stone (now in Cefn Coed Church)), SO032081 | A 1.5 m (5 ft) high square-sectioned pillar stone thought to date to the Bronze Age. A Latin inscription on the west face and cross incised on the north face are from the 6th and 7th-9th centuries. Holes in the stone indicate that it had been used as a gatepost. | Brecknockshire | 3Early Medieval | BR145 |
| Platform Houses and Cairn Cemetery on Dinas Noddfa | House platforms (& Cairnfield) | Bedlinog | 51°43′10″N 3°18′48″W﻿ / ﻿51.7195°N 3.3132°W﻿ / 51.7195; -3.3132﻿ (Platform Houses and Cairn Cemetery on Dinas Noddfa), SO093031 | Medieval house platforms, also prehistoric cairnfield | Glamorganshire | 4Medieval | GM314 |
| Platform Houses on Coly Uchaf | Platform house | Bedlinog | 51°42′40″N 3°18′58″W﻿ / ﻿51.7112°N 3.3161°W﻿ / 51.7112; -3.3161﻿ (Platform Houses on Coly Uchaf), SO091022 | | Glamorganshire | 4Medieval | GM320 |
| Morlais Castle | Castle | Pant | 51°46′36″N 3°22′44″W﻿ / ﻿51.7768°N 3.3789°W﻿ / 51.7768; -3.3789﻿ (Morlais Castle), SO049095 | The collapsed remains of a castle begun in 1288 by Gilbert de Clare, Lord of Glamorgan. The walls enclosed an area of approximately 130 by 60 m (430 by 200 ft). It was captured during the 1294-95 rebellion of Madog ap Llywelyn and may have been abandoned shortly afterwards. | Glamorganshire | 4Medieval | GM028 |
| Cae Burdydd Castle | Motte | Vaynor | 51°46′57″N 3°22′56″W﻿ / ﻿51.7824°N 3.3823°W﻿ / 51.7824; -3.3823﻿ (Cae Burdydd Castle), SO047102 | A 3 m (9.8 ft) high motte and ditch dating to the medieval period. The diameter of 23 m (75 ft) narrows to 9 m (30 ft) at the top. | Brecknockshire | 4Medieval | BR118 |
| Cefn Car settlement | Building (Unclassified) | Vaynor | 51°48′30″N 3°25′32″W﻿ / ﻿51.8084°N 3.4256°W﻿ / 51.8084; -3.4256﻿ (Cefn Car settlement), SO018131 | | Glamorganshire | 4Medieval | GM571 |
| Gurnos Quarry Tramroad & Leat | Industrial monument | Gurnos | 51°45′45″N 3°24′01″W﻿ / ﻿51.7624°N 3.4002°W﻿ / 51.7624; -3.4002﻿ (Gurnos Quarry Tramroad & Leat), SO034080 | | Glamorganshire | 5Post-Medieval/Modern | GM478 |
| Sarn Howell Pond and Watercourses | Pond | Town | 51°44′50″N 3°19′27″W﻿ / ﻿51.7471°N 3.3241°W﻿ / 51.7471; -3.3241﻿ (Sarn Howell Pond and Watercourses), SO086062 | | Glamorganshire | 5Post-Medieval/Modern | GM494 |
| Abercanaid egg-ended boiler | Egg-ended Boiler, re-purposed as garden shed | Troed-y-rhiw | 51°43′29″N 3°22′04″W﻿ / ﻿51.7248°N 3.3679°W﻿ / 51.7248; -3.3679﻿ (Abercanaid egg-ended boiler), SO056037 | | Glamorganshire | 5Post-Medieval/Modern | GM572 |
| Cyfarthfa Canal Level | Canal Level | Cyfarthfa | 51°44′20″N 3°23′15″W﻿ / ﻿51.7388°N 3.3876°W﻿ / 51.7388; -3.3876﻿ (Cyfarthfa Canal Level), SO042053 | | Glamorganshire | 5.7Post-Medieval/Modern | GM467 |
| Cyfarthfa Tramroad Section at Heolgerrig | Tramroad | Cyfarthfa | 51°44′46″N 3°24′16″W﻿ / ﻿51.7462°N 3.4044°W﻿ / 51.7462; -3.4044﻿ (Cyfarthfa Tramroad Section at Heolgerrig), SO031062 | | Glamorganshire | 5.7Post-Medieval/Modern | GM495 |
| Iron Ore Scours and Patch Workings at Winch Fawr, Merthyr Tydfil | Iron mine | Cyfarthfa | 51°45′07″N 3°25′27″W﻿ / ﻿51.752°N 3.4241°W﻿ / 51.752; -3.4241﻿ (Iron Ore Scours and Patch Workings at Winch Fawr, Merthyr Tydfil), SO017068 | | Glamorganshire | 5.7Post-Medieval/Modern | GM554 |
| Ynys Fach Iron Furnaces | Industrial monument | Cyfarthfa | 51°44′42″N 3°23′03″W﻿ / ﻿51.745°N 3.3841°W﻿ / 51.745; -3.3841﻿ (Ynys Fach Iron Furnaces), SO045060 | | Glamorganshire | 5.7Post-Medieval/Modern | GM331 |
| Penydarren Tram Road | Trackway | Merthyr Vale | 51°40′15″N 3°19′49″W﻿ / ﻿51.6707°N 3.3304°W﻿ / 51.6707; -3.3304﻿ (Penydarren Tram Road), ST080977 | | Glamorganshire | 5.7Post-Medieval/Modern | GM359 |
| Iron Canal Bridge from Rhydycar | Bridge | Park | 51°45′01″N 3°23′09″W﻿ / ﻿51.7504°N 3.3857°W﻿ / 51.7504; -3.3857﻿ (Iron Canal Bridge from Rhydycar), SO044066 | | Glamorganshire | 5.7Post-Medieval/Modern | GM486 |
| Pont-y-Cafnau tramroad bridge | Bridge | Park | 51°45′17″N 3°23′44″W﻿ / ﻿51.7546°N 3.3956°W﻿ / 51.7546; -3.3956﻿ (Pont y Cafnau Tramroad Bridge), SO037071 | An ironwork bridge spanning the River Taff constructed in 1793. The name, meaning "bridge of troughs", comes from its unusual three tier design of a tramroad between two watercourses, one beneath the bridge deck and the other on an upper wooden structure which is no longer present. Pont-y-Cafnau is also Grade II* listed. | Glamorganshire | 5.7Post-Medieval/ModernPost-Medieval | GM424 |
| Merthyr Tramroad: Morlais Castle section | Tramroad | Pant | 51°46′43″N 3°22′57″W﻿ / ﻿51.7786°N 3.3826°W﻿ / 51.7786; -3.3826﻿ (Merthyr Tramroad: Morlais Castle section), SO047097 | | Glamorganshire | 5.75Post-Medieval/Modern | GM594 |
| Merthyr Tramroad Tunnel (Trevithick's Tunnel) | Tramroad | Troed-y-rhiw | 51°44′06″N 3°22′07″W﻿ / ﻿51.7349°N 3.3686°W﻿ / 51.7349; -3.3686﻿ (Merthyr Tramroad Tunnel (Trevithick's Tunnel)), SO055049 | | Glamorganshire | 5.75Post-Medieval/Modern | GM573 |
| Cwmdu Air Shaft & Fan | Air Shaft | Cyfarthfa | 51°44′14″N 3°24′14″W﻿ / ﻿51.7371°N 3.4039°W﻿ / 51.7371; -3.4039﻿ (Cwmdu Air Shaft & Fan), SO031051 | | Glamorganshire | 5.8Post-Medieval/Modern | GM460 |
| Remains of Blast Furnaces, Cyfarthfa Ironworks | Blast Furnace | Park | 51°45′08″N 3°23′43″W﻿ / ﻿51.7521°N 3.3952°W﻿ / 51.7521; -3.3952﻿ (Remains of Blast Furnaces, Cyfarthfa Ironworks), SO037068 | | Glamorganshire | 5.8Post-Medieval/Modern | GM425 |
| Tai Mawr Leat for Cyfarthfa Iron Works | Leat | Park | 51°45′31″N 3°24′17″W﻿ / ﻿51.7586°N 3.4046°W﻿ / 51.7586; -3.4046﻿ (Tai Mawr Leat for Cyfarthfa Iron Works), SO031076 | | Glamorganshire | 5.8Post-Medieval/Modern | GM479 |
| Deserted Iron Mining Village, Ffos-y-fran | Industrial monument | Troed-y-rhiw | 51°44′31″N 3°20′47″W﻿ / ﻿51.742°N 3.3463°W﻿ / 51.742; -3.3463﻿ (Deserted Iron Mining Village, Ffos-y-fran), SO071056 | | Glamorganshire | 5.8Post-Medieval/Modern | GM496 |
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