Maine is the easternmost state in New England. Its rugged, indented coastline and glacier-carved, forested interior give this state its unique character and have shaped the character of its people, Maine shares land borders with New Brunswick, Québec, and New Hampshire. For visitors from overseas or the rest of the United States, Boston is the major gateway to Maine. Coastal areas are moderated somewhat by the Atlantic Ocean. Daytime highs are generally in the 75–80 °F (24–27 °C) range throughout the state in July, with overnight lows in the high 50s°F (around 15 °C). January temperatures range from highs near 32 °F (0 °C) on the southern coast to overnight lows below 0 °F (−18 °C) in the far north. There is bus service from Boston to Maine’s major cities, and the Amtrak Downeaster offers train service from Boston’s North Station to Portland. Mount Desert Island is home to Acadia National Park—Maine’s most visited attraction. More than 2 million people a year come to climb (mostly by car) the miles of 19th-century carriage roads leading to the stunning peaks and vistas of the island’s mountains