mainland

mantere The main landmass of a country or continent
1719: w:Daniel Defoe|Daniel Defoe, w:Robinson Crusoe|Robinson Crusoe

...I got to the mainland, where, to my great comfort, I clambered up the cliffs of the shore and sat me down upon the grass, free from danger and quite out of the reach of the water.

You may have not realised when I was using the term mainland Europe, I was excluding the British Isles.