Today I visited the #makerfaire at @tudelft and of course I *had* to take a picture with these concrete 3D printed "menhirs" used in a very cool arch bridge made with recycled materials. "The bridge was placed between two end pieces or ‘menhirs’ made with a 3D concrete printer. The menhirs also guide the steel cables that act as railings." I also had to check the extremely satisfying first layer (second photo) 😌 so smooth!