Scotland offers astonishing variety: its sophisticated cities such as Edinburgh and Glasgow, and iconic landscapes of moors, mountains, and lochs, have strong allure. Americans make up the largest market of international visitors, with over 300,000 annually. St. Andrews is a pilgrimage for golfers; castles dot the country; and whisky distilleries are popular around the northeast and western islands. Scotland's customs and products--from tartans and bagpipes to tweeds--are known worldwide, but there's nothing like experiencing them firsthand.