A tree has grown in Brooklyn. Etched into blue stone, the tree is part of a new sidewalk along Columbia Street. The artworks (there are actually several etched trees) by Nobuho Nagasawa were installed along the street as part of the Department of Transportation's reconstruction of the corridor for the Brooklyn Waterfront Greenway Initiative, according to the Architect's Newspaper. Nagasawa's work, called "Timecast," mimics the shadow of a newly planted tree and aims to memorialize local history. The blue stone came from a New York State quarry, and the tree itself was sandblasted on by Brooklyn-based Ottavino Stoneworks, making it possibly the most locally-grown sidewalk in the city.