Castanea, commonly known as chestnut, is a genus of trees and shrubs that produce edible nuts. These trees are native to temperate regions of the Northern Hemisphere and are well-known for their large, spiky seed cases that contain the shiny, brown nuts. Chestnuts are not only delicious but also nutritious, being rich in carbohydrates, vitamins, and minerals. The most popular species include the American chestnut, European chestnut, and Chinese chestnut. Chestnuts have been a staple food in many cultures for centuries, often roasted or used in various dishes. They are also valued for their timber, which is durable and resistant to decay, making it useful in construction and furniture-making.