Name the county of extreme southwest England bounded by the English Channel and the Atlantic Ocean.

This peninsula forms the extreme southwestern tip of Great Britain. It is almost entirely surrounded by water, with the wild Atlantic Ocean to the north and west and the English Channel to the south. Its only land border is with the county of Devon to the east, a boundary largely defined by the River Tamar. This unique geographical position gives it hundreds of miles of varied and often dramatic coastline.

Far more than just a geographical feature, the region has a distinct cultural identity rooted in its Celtic heritage. It is recognized as one of the six Celtic nations, alongside Brittany, Ireland, the Isle of Man, Scotland, and Wales. This is reflected in its own language, Cornish (Kernewek), which has undergone a successful revival in recent decades. Place names, local traditions, and a fierce sense of independence set it apart from the rest of England.

Historically, its landscape was defined by a thriving tin and copper mining industry, so significant that its mining landscapes are now a UNESCO World Heritage Site. Today, its rugged cliffs, picturesque fishing villages, and sandy beaches make it a major center for tourism, art, and surfing, drawing visitors to famous landmarks like Land's End and St Michael's Mount.