page_title: Traeth Mawr
hierarchical_section_title: Traeth Mawr
caption_attribution_description: View inland from a Ffestiniog Railway train on the Cob at Porthmadog.
context_page_description: Traeth Mawr is a polder near Porthmadog in Gwynedd in Wales. The area was formerly the large tidal estuary of the Afon Glaslyn. It was created after large-scale land reclamation occurred in the late 18th century and the early 19th century. A large embankment, called the Cob, separates the area from the sea and carries a road and railway line.
context_section_description: Traeth Mawr (Welsh for "big sands") is a polder near Porthmadog in Gwynedd in Wales. The area was formerly the large tidal estuary of the Afon Glaslyn. It was created after large-scale land reclamation occurred in the late 18th century and the early 19th century. A large embankment, called the Cob, separates the area from the sea and carries a road and railway line.
caption: The low-lying land that forms the polder of the Traeth Mawr
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