Kayaking in Adams inlet in Glacier Bay National Bay, Alaska. With hundreds of miles of rugged shoreline and tidewater glaciers, Glacier Bay is one of the premier locations for sea kayaking in the world. In 1794, Captain George Vancouver sailed by the mouth of Glacier Bay in the H.M.S. Discovery when todays 65-mile long bay was filled with an enormous valley glacier. He described the bay as, 'a compact sheet of ice as far as the eye could distinguish. Soon after his visit, the glacier filling the valley crumbled to reveal the bay and has continued to recede ever since.