Poland borders Germany to the west on the Baltic Sea. Area spans 312,680 km² matching New Mexico's size. Baltic coastline stretches 440 km including 20 islands. Borders Lithuania and Russian Kaliningrad north, Ukraine and Belarus east, Czech Republic and Slovakia south. 60 percent of 36.56 million people live in cities. Population density hits 116.9 per km². Northern regions remain very flat. Southern Carpathians and Sudetes rise up. Highest peak Rysy reaches 2,499 meters in Tatra Mountains. Northwest hosts Masurian Lake District of lakes and forests. Interior features North Polish Plain and South Polish Plateau. Country averages 173 meters above sea level. Name derives from Polans tribe meaning lowland dwellers.