Wave Garden v6.0.0

(Ned Kahn has proposed filling an empty construction site in San Francisco with “shimmering metal discs that evoke a dry lake.” Image by the artist. See also v1.0.0, v2.0.0, v3.0.0, v4.0.0 and v5.0.0. An extra proposal. Related: Un-vanishing a lake. Via Landscape+Urbanism.)