Hajdú-Bihar megye is a county located in eastern Hungary. It is bordered by Romania to the east and is known for its diverse landscapes, including plains and hills. The county's administrative center is Debrecen, which is the second-largest city in Hungary and a cultural hub. The region has a rich history and is famous for its agricultural production, particularly cereals and vegetables. Hajdú-Bihar is also home to several thermal baths and natural attractions, making it a popular destination for both locals and tourists seeking relaxation and recreation.