Deceptively wire-like from afar, the Tetraeder is one of the most striking stops on the Industrial Heritage Trail. The airy 60m-high installation is made from steel pipes, gracing the top of a former slag heap turned landscape park. You can climb the Tetraeder via 'floating' staircases suspended from steel cables, which lead to viewing platforms. Views of the surprisingly green, yet undeniably industrial, surrounds are impressive rather than conventionally beautiful. At night, the illuminated Tetraeder glows from afar.
