The Museo de Escultura al Libre of Castellana consists of avant-garde 20th Century sculpture on both sides of the Paseo de la Castellana. Many well known sculptors are represented. The Stranded Mermaid is a striking work by the Baroque sculptor Eduardo Chillida and there is a penguin by Juan Miro. You can also see works by Alberto Sanchez, Pablo Serrano and Eusebio Sempere and several other artists.