Arbre 

"Arbre," by Eduardo Chillida, is a monumental steel sculpture that embodies the artist's fascination with the natural world. The sculpture's abstract form, suggestive of a tree's branches reaching towards the sky, invites viewers to engage with the work on a personal level. Chillida's signature use of negative space, the void between the steel forms, creates a sense of depth and mystery, adding to the sculpture's powerful presence. The rough, rusted surface of the steel adds to the work's organic feel, suggesting the passage of time and the enduring nature of nature itself.