The Invisible Barn, an architectural folly (which means it was designed for ornamentation purposes) was designed by New York practice stpmj.
The barn was designed to complement the dense woods of Socrates Sculpture Park–to celebrate the landscape by mirroring it.
The barn itself is shaped like a parallelogram, so you can squeeze it into a dense grove of trees. Its construction is simple, just 2×4 wood studs wrapped in sheathing. Then the sheathing gets coated in a thin film of Mylar that renders the structure (mostly) invisible.
But the Invisible Barn’s best design feature isn’t its invisibility; it’s the places where the barn is just barely visible. Designers left cut-outs for open air windows, which create the illusion of floating frames within the trees.