Van Long Nature Reserve is a picturesque destination located in Gia Vien district, Hung Yen. It is known for its stunning limestone karsts, lush greenery, and diverse wildlife. Visitors can take a boat ride along the river, surrounded by towering cliffs and tranquil waters. The reserve is home to many rare species, including the Delacour's langur, one of the world's most endangered primates. Nature lovers will appreciate the peaceful ambiance and the opportunity to observe the region's unique flora and fauna.