Scotland offers astonishing variety: its iconic lochs and mountains, as well as lively cities such as Edinburgh and Glasgow, have strong allure. Visitors from North America increased 28% in 2014, to over 500,000. St. Andrews is a pilgrimage for golfers; castles dot the country; and whisky distilleries are gaining popularity. Scotland's customs and products--from tartans to tweeds--are known worldwide, but there's nothing like experiencing them firsthand.