New Delhi, Feb. 21 -- A blustery cold day calls for huddling in front of a fireplace with hot chocolate, but the rhythmic sound of the waves and the thought of "treasure hunting" lure me out of my comfy hotel in Newquay, Cornwall, in the UK. Over the last few years, I have switched allegiance from the sea to mountains, from beaches to alpine forests. But in Cornwall, a ceremonial county bordered by the Atlantic Ocean to the north and west, Devon to the east and the English Channel to the south, I find a whole new lens to look at the ocean.

Sea glass, a natural treasure that's been shaped by time and tide.

Cornwall is the UK's southernmost county and diverges greatly in its geography. North Cornwall is rugged and wild with coast-hugging ...