Lunar Bird

Geometric Mouse, Variation I, Scale A is an abstract sculpture by Claes Oldenburg. created in 1971. Examples are located at the Hirshhorn Museum and Sculpture Garden, Museum of Modern Art, and Walker Art Center.

https://en.wikipedia.org/wiki/Geometric_Mouse%2C_Variation_I%2C_Scale_A

Geometric Mouse

Sunset Song

Pittsburgh Landscape is a 1954 painted steel abstract sculpture, by David Smith. It is in the Hirshhorn Museum and Sculpture Garden.

https://en.wikipedia.org/wiki/Pittsburgh_Landscape

Pittsburgh Landscape

Monsoon Drift is an abstract steel sculpture by English sculptor Anthony Caro, from 1975. It is located in the Hirshhorn Museum and Sculpture Garden, in Washington, D.C. In 1973, he salvaged rolled steel material, at the Consett steel mills, County Durham, to later use in his sculptures.

https://en.wikipedia.org/wiki/Monsoon_Drift