At a glance
North Anglesey copper port with a Georgian inner harbour and the extraordinary mineral landscape of Parys Mountain (world's largest copper mine in the 1780s) immediately above the town. Free Heritage Trail on the mountain. Combined with Cemlyn Bay (6 miles) for a north Anglesey day. LL68 9EN.
About Amlwch
Amlwch is a harbour town on the north coast of Anglesey, built around the export of copper from Parys Mountain — the vast open-cast mine on the hill immediately above the town that was, in the 1780s, the most productive copper mine in the world. In its peak decades, more than 1,500 people worked on the mountain, and ships loaded continuously from Amlwch's purpose-built inner harbour, carrying ore to smelters in Swansea and shipping copper to naval dockyards where it sheathed the hulls of Royal Navy warships. The "copper-bottomed" ships of Nelson's era owed their durability partly to Anglesey copper.
The mine itself is the reason to visit. Parys Mountain's open-cast workings have left behind a landscape of otherworldly colour — ochre, purple, turquoise, and orange mineral staining on bare rock, without vegetation, spread across a series of craters, spoil heaps, and flooded pits. The chemistry of the acid drainage is so hostile that few plants can survive; the site is protected as an SSSI for its unique extremophile environment. A Heritage Trail circles the main workings, passing a restored 18th-century windmill, engine houses, and the main Pearl Engine Pond. The views from the summit reach across the whole island and to the Irish Sea beyond.
The harbour below retains its Georgian-industrial character — stone quays, narrow channel, and the surrounding remnants of copper works and warehouses. Amlwch is not a tourist resort; it is a working town on the island's quieter north coast, more rewarding for visitors prepared to engage with its industrial story than those seeking the coastal scenery of the south and west Anglesey beaches.
Find it on the map
Frequently asked questions
Parys Mountain (Mynydd Parys) is a former copper mine on the hill immediately south of Amlwch — in the 1780s it was the most productive copper mine in the world, producing more copper than all other mines in Britain combined and driving down the global price of copper dramatically. The mountain had been worked for copper since at least the Bronze Age, but the great open-cast phase of extraction began in 1768 after the discovery of a rich ore body. At its peak, over 1,500 people worked on the mountain. The mine produced copper used for sheathing the hulls of Royal Navy warships — the "copper-bottomed" ships of Nelson's era — as well as for coinage, pipes, and industrial products. The open-cast workings have left behind a vast landscape of ochre, purple, orange, and turquoise mineral-stained rock, without vegetation, that is quite unlike anything else in Wales.
The most striking feature of Parys Mountain is the open-cast landscape itself — the main crater, Pearl Engine Pond, and the surrounding spoil heaps form a moonscape of mineral-stained rock in vivid colours. A Heritage Trail (free access) circles the main workings, passing a restored windmill (used to pump water from the mine), engine houses, and interpretation panels. The summit gives views across Anglesey and to the Irish Sea. The acid drainage from the mine has created a uniquely hostile chemical environment that few plants can tolerate — the bare mineral landscape is actually protected as a Site of Special Scientific Interest for its unusual extremophile chemistry. Access to the mine workings themselves is restricted for safety, but the perimeter path and viewpoints give a comprehensive impression of the scale of extraction.
Amlwch's inner harbour is a small, almost circular tidal harbour cut into the rock, built in the 18th century specifically to export copper ore from Parys Mountain. At its peak in the 1780s–90s, Amlwch was one of the busiest ports in Wales, with ships loading copper ore for smelters in Swansea and elsewhere. The harbour retains much of its Georgian-industrial character — stone quays, warehouses, and the narrow channel entrance. In the 19th century Amlwch also built ships and refined copper locally; the old copper works and some industrial buildings survive around the harbour. Today the harbour is quiet, a working and leisure harbour, with the ochre-stained hills of Parys Mountain visible on the skyline above the town as a constant reminder of the industry that built it.
Amlwch rewards visitors interested in industrial history or unusual landscapes. Parys Mountain is genuinely extraordinary — a vivid, alien landscape unlike anything else in Wales that has struck observers from the 18th century onwards. Amlwch harbour gives a tangible sense of the scale of copper trade that once made this small town economically significant. The town itself is a practical, non-touristy Anglesey settlement with good views from the headland above the harbour. Combined with Cemlyn Bay (RSPB tern colony, 6 miles west) and Llyn Alaw (5 miles south), it makes a natural north Anglesey day.
Amlwch is on the A5025 road that circles the north coast of Anglesey, approximately 14 miles north of Llanfairpwll (with its famous long name) and 16 miles north-east of Holyhead. There is no train service to Amlwch — a car is recommended. Bus services run from Llangefni (the island's administrative centre, 8 miles south) and from Holyhead. Parys Mountain is on the southern edge of town on the B5111 road; a lay-by marks the start of the Heritage Trail. The postcode for the town centre is LL68 9EN.