For 10 points, name this country that lies east of Germany with capital Warsaw.
The Bay of Puck indents the coast of this country, and its southern border features the Western Tatras mountains. The Russian exclave of Kaliningrad has this country on its southern border. Part of this country's western border is formed by the (*) Oder River, and its longest river is the Vistula, which flows into the Baltic Sea near Gdansk. For 10 points, name this country that lies east of Germany with capital Warsaw.
The Bay of Puck indents the coast of this country, and its southern border features the Western Tatras mountains.
Republic of Poland (accept Rzeczpospolita Polska)