Forty-nine 3/4″ thick steel plates curl in on themselves to form a public day-lit bathroom in the Lady Bird Lake Hike and Bike trail, Austin, TX. Its design eliminated the need for artificial lights or ventilation. The steel was left untreated, rust has already formed on the plates.
Miro RIvera proves that functional, necessary outbuildings can also be beautiful and well designed.
thanks to Jacob B. for pointing this out!