The horse chestnut, scientifically known as Aesculus hippocastanum, is a large deciduous tree native to the Balkans but widely planted in parks and streets across Europe and North America. It can grow up to 75 feet tall and features large, palmate leaves and striking white or pink flowers that bloom in spring. The tree produces spiky green seed cases that contain shiny brown seeds, commonly referred to as conkers. Despite its name, the horse chestnut is not related to true chestnuts and is not edible for humans. The seeds contain toxic compounds that can be harmful if ingested. However, they are sometimes used in traditional medicine and are known for their potential benefits in treating conditions like varicose veins and hemorrhoids.