The United States border in the north on Canada, in the south — with Mexico, also have sea border with Russia. Are washed by the Pacific Ocean from the West and the Atlantic Ocean — from the East.

Relief of North America
The surface of North America is very various. At average height of the continent of 720 m above sea level, the most part has it heights from 200 to 500 m, 20 % are the share of lowlands. More than 25 % of the territory make heights over 1000 m. The highest point of North America — Mount McKinley — 6193 m, the lowest — Death Valley — 85 m below sea-level.

In the United States of America about 18 thousand lakes are. The considerable part from them is in a northern part of the USA, near border with Canada: according to hydrographers, only in states Maine and Michigan is 13,5 thousand lakes. The most known and the largest — the Great Lakes on northern border of the USA and Canada, and also the well-known besstochny salty lakes located in the Big Pool — the lowland between ridges Sierra-Nevada, the Cascade and Rocky Mountains in the northwest of the USA.