"Cheese rivers" refer to a phenomenon where melted cheese flows in a manner similar to a river. This can occur during the cooking process, particularly with certain types of cheese that have a high fat content, such as cheddar or mozzarella. When heated, these cheeses become viscous and can spread out, resembling flowing water. This concept is often seen in culinary presentations, especially in dishes like fondue or cheese dips. The visual appeal of cheese rivers can enhance the dining experience, making the dish more inviting and enjoyable for those who appreciate rich, creamy flavors.