Final answer:
Poland's landscape around the Baltic Sea is particularly noted for its numerous 3. lakes, forming part of the Northern Lowlands.
Step-by-step explanation:
Poland's northeast landscape, around the Baltic Sea, is noted for its 3. lakes. This area falls under the Northern Lowlands of Europe, which are characterized by prairies and tall grasses, and the land is mostly used as farmland. Additionally, this region contains various geographical features including bogs, heaths, and notably, a significant number of lakes.
Although the area is primarily agricultural, it offers a unique landscape with its many lakes intertwining with the farmland and other natural features, providing a distinct and diverse ecosystem.