Comprised of England, Northern Ireland, Scotland and Wales, the United Kingdom definitely has dozens of reasons worth leaving home for. Mountains, valleys, hills and dales, forests and gardens, oh and no less than 25 UNESCO World Heritage sites scattered throughout, are but a few. You will find a slew of cathedrals, castles, palaces and country houses spanning history. Centuries of inspiring the world, influencing the arts, and forming natural beauty have developed this land into one great nation.