What are the polderlands?

Answer 1

A polder is the unit of land enclosed by dikes and managed as an independent hydrological entity below the local water table.

Answer 2

Polderlands are low-lying areas in the Netherlands that have been drained by a system of dikes and canals to reclaim land from the sea. These areas are used for agriculture and are characterized by their flat, fertile terrain. Polderlands are an important part of Dutch landscape and are well-known for their windmills and tulip fields.