Cornwall is a county in South West England in the United Kingdom. The county is bordered to the north and west by the Celtic Sea, to the south by the English Channel, and to the east by the county of Devon, over the River Tamar which forms most of the border between them.

Cornwall forms the westernmost part of the South West Peninsula of the island of Great Britain. The furthest south-western point of the island is Land's End; the southernmost point is Lizard Point.

https://www.visitcornwall.com/