No land mass borders Britain on the west. The Atlantic Ocean is immediately to the west of Britain. The closest land to the west of Great Britain is the top northeastern tip of the United States: the state of Maine, in particular.
Great Britain is an island consisting of three countries: England, Scotland, and Wales. It shares borders with Ireland (Northern Ireland to the north and the Republic of Ireland to the west), but it does not have any land borders with other countries.
The State of Idaho borders the State of Montana directly to the West.
Illinois borders Indiana to the west.
The Mediterranean Sea borders Canaan to the west.
Arkansas borders Oklahoma to the west.
Ecuador borders southwest Colombia, and Panama borders northwest Colombia.
The two country is Israel and Jordan between the west bank.
Canada's west coast borders the Pacific Ocean.
Europe borders Asia on the west.
The state of South Australia borders victoria to the west.
Pennsylvania's western borders are with the states of Ohio to the west and West Virginia to the southwest.
California borders Nevada to the south and west.