American Samoa
Pago Pago has one of the best natural deepwater
harbors in the South Pacific Ocean, sheltered by shape from rough
seas and protected by peripheral mountains from high winds;
strategic location in the South Pacific Ocean
Andorra
landlocked; straddles a number of important crossroads in
the Pyrenees
Angola
the province of Cabinda is an exclave, separated from the
rest of the country by the Democratic Republic of the Congo
Anguilla
the most northerly of the Leeward Islands in the Lesser
Antilles
Antarctica
the coldest, windiest, highest (on average), and driest
continent; during summer, more solar radiation reaches the surface
at the South Pole than is received at the Equator in an equivalent
period; mostly uninhabitable
Antigua and Barbuda
Antigua has a deeply indented shoreline with
many natural harbors and beaches; Barbuda has a large western harbor
Arctic Ocean
major chokepoint is the southern Chukchi Sea (northern
access to the Pacific Ocean via the Bering Strait); strategic
location between North America and Russia; shortest marine link
between the extremes of eastern and western Russia; floating
research stations operated by the US and Russia; maximum snow cover
in March or April about 20 to 50 centimeters over the frozen ocean;
snow cover lasts about 10 months
Argentina
second-largest country in South America (after Brazil);
strategic location relative to sea lanes between the South Atlantic
and the South Pacific Oceans (Strait of Magellan, Beagle Channel,
Drake Passage); diverse geophysical landscapes range from tropical
climates in the north to tundra in the far south; Cerro Aconcagua is
the Western Hemisphere's tallest mountain, while Laguna del Carbon
is the lowest point in the Western Hemisphere
Armenia
landlocked in the Lesser Caucasus Mountains; Sevana Lich
(Lake Sevan) is the largest lake in this mountain range
Aruba
a flat, riverless island renowned for its white sand beaches;
its tropical climate is moderated by constant trade winds from the
Atlantic Ocean; the temperature is almost constant at about 27
degrees Celsius (81 degrees Fahrenheit)