Salta Moss, where a Bronze Age rapier was discovered, boasts flora that is unusual for a mire on the Solway Plain, and has been designated a “Site of Special Scientific Interest” since 1982.

[7] As the presence of Hadrian's Wall attests, the Solway Plain is also known for its history as a disputed borderland, control of which was often fought over — from the Roman occupation of Britain to the Border Reivers and Anglo-Scottish conflicts in the Middle Ages.

In the hillier regions toward the southeastern part of the plain, further from the coast, woodlands are common and river valleys are pronounced.

[1][8] In June 2012, it became clear that the Solway Plain between Silloth, Abbeytown and Westnewton has been identified as a potential site for a Geological Disposal Facility for the UK's high-level nuclear waste.

The Solway Plain wasn't named by the Managing Radioactive Waste Safely (MRWS) Partnership, rather they referred to the 'Low permeability sedimentary rocks associated with the Mercia Mudstone Group (MMG)'.