This year, the Frieze Art Fair is opening its annual sculpture exhibition in the summer. The display of 25 large-scale artworks in London’s Regent Park focuses on 20th-century and contemporary art, including a steel red wheelbarrow by Michael Craig-Martin, a pile of bronze footballs by Hank Willis Thomas, and a white-enameled bronze tree by Ugo Rondinone. Other artists in the exhibition include Urs Fischer, Sarah Sze, and Magdalena Abakanowicz.