attraction

GeoMôn UNESCO Global Geopark

Parys Mountain copper mine, once the biggest in the world
GeoMôn is a place with spectacular geology, stunning rocky cliffs, extensive sandy beaches, small rocky coves, ancient monuments and a variety of quarries and mines. Visit our centre for more information on what to see and where to see them.

Attraction Information

Get in touch

Location:
The Watch House, Porth Amlwch, Anglesey / Ynys Môn, Amlwch, Isle of Anglesey, LL68 9DB
Email:
info@geomon.co.uk
Website:
http://www.geomon.org.uk

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Facilities

  • Accessibility Facilities
  • Cater For Groups
  • Children Welcome
  • Mobility Accessibility Facilities

Take a look around

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Old Red Sandstone at Lligwy - formed by a large river flowing through a desert environment - somewhat reminiscent of the Nile today
Old Red Sandstone on the north of Traeth Lligwy
Amlwch
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Traeth Lligwy, a beautiful and very popular sandy beach,  flanked by Devonian desert rocks to the north and  Carboniferous rocks (mainly fossiliferous
Lligwy, flanked by Devonian & Carboniferous rocks
Amlwch
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Din Lligwy - an iron age settlement (hut group or village) conveniently constructed from up-ended slabs of carboniferous limestone from what has a lim
Din Lligwy - iron age settlement
Amlwch
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Ynys Llanddwyn, these amazingly coloured rocks are a complex mixture (a melange) of limestone, marble, pillow lava and deep sea sediments dating from
Melange, a world famous rock at Ynys Llanddwyn
Amlwch
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These Precambrian lavas on the beach at Newborough and along Ynys Llanddwyn were erupted on a deep ocean floor, squeezed out of small vents and solidi
Pillow lavas, Traeth Newborough
Amlwch
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Quartzite, a very hard massive rock in Breakwater Quarry from where it was quarried to build a huge embankment on which the Breakwater sits.
quartzite in Breakwater Quarry, Holyhead
Amlwch
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This rock was originally soft mud which underwent extreme compression turning it into green schist - named New Harbour from the locallity where it was
New Harbour green schist, typical west coast rock
Amlwch
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GeoMôn has a number of information board around Anglesey explaining the geology, here in Cemaes harbour, but also at South Stack, Lligwy, Malltraeth,
GeoMon information board in Cemaes harbour
Amlwch
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This Limestone coast between Moelfre and Lligwy is spectacular with cliffs, quarries, fossils and in places with spectacular evidence of changing sea
Limestone coast scenery between Moelfre and Lligwy
Amlwch

About GeoMôn UNESCO Global Geopark

GeoMôn - designated a Global Geopark by UNESCO - covers the whole of Anglesey which has spectacular geology dating back almost 1,800 million years with more than 100 different rock types and many types of surface sediments. It is home to the oldest fossils in the UK. Each rock type creates its own landscape either from its own characteristics, or from the way it reacts to the forces of erosion, or by how it weathers to form soils which underpin biodiversity and land use. Stunning rocky cliffs, extensive sandy beaches, small rocky coves, ancient monuments and settlements, and a variety of quarries and mines are some of the characteristics of our landscape. The human landscape is defined by building stones influencing architecture and by soils influencing agriculture and forestry. It is so special that it has been recognised as one of the top 100 geo-sites in the world.

Our mission is to enhance knowledge and awareness of Anglesey’s spectacular geoheritage as a resource for education at all levels from primary school to university researchers including the general public and for recreation for both visitors and residents of the Island and thereby to improve the local economy and employment prospects on the island.

We aim to encourage awareness of, and educate about, the geodiversity and geoheritage, the historical, cultural and economic importance of the area, and encourage further geological and related research.

ore vein at Parys Mountain copper mine
ore vein at Parys Mountain copper mine

Our visitor centre in the historic Porth Amlwch has displays of all the major rock types of Anglesey, information on the wider geology and temporary displays - the current focus is on climate change ancient and modern. We have books and leaflets for sale and some free trail leaflets. Come and visit us to explore and discover this outstanding Geo-heritage, which underpins all aspects of landscape development, biodiversity, land use, human history, agriculture and even culture. Explore our listed geosites; follow our self-guided trails or join on one of our guided walks.

We provide a regular programme of guided walks led by expert geologists tailored to the interested beginner but able to dive into great scientific detail if requested. Check our website for dates and details. We can provide bespoke trips tailored to the group from one to three days across a range of sites and themes. at various levels.

visit our website www.geomon.org.uk

our Facebook page https://www.facebook.com/AngleseyGeoparkGeoMon

our Facebook discussion group https://www.facebook.com/groups/Geomon

Location

53.41608, -4.33178

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NOTE: The above information is generated by third-party data provided by GeoMôn UNESCO Global Geopark. © GeoMôn UNESCO Global Geopark 2025.

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