The Vasco da Gama Aquarium, on N6, near Algés on the Cascais railway line, has been in operation since 1898. Live exhibits include the eared seals pavilion and a vast number of tanks that hold fish and other sea creatures from all over the world. A large portion of the exhibits consist of zoological material brought back from oceanographic expeditions by Carlos I. They include preserved marine invertebrates, water birds, fish, mammals, and some of the king's laboratory equipment.