“Experiencing Neo-Baroque Walkway,” says the artist Dan Graham of his latest pavilion, “involves a somewhat psychedelic, optical distortion of the spectator’s body.” Graham’s pavilion structures are usually geometric, but this one consists of waves, or rather, two waves of glass side panels that have a two-way-mirror coating. The walkway places viewers inside a space that hides and reveals them at once, while reflecting and commenting on their every move. —E.C.