The Ruhrgebiet

The Tetraeder is one of the most striking stops on the Ruhr Valley's Industrial Heritage Trail. The airy 60m-high installation by Wolfgang Christ is a triangular pyramid made from steel pipes atop a massive 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.

It's about 3km northeast of Bottrop Hauptbahhhof.

Lonely Planet's must-see attractions

Nearby The Ruhrgebiet attractions

1. Josef Albers Museum


Bottrop-born Josef Albers (1888–1976) was a painter of abstract works that combine bold use of colour with geometric forms. A member of the Bauhaus school…

2. Gasometer Oberhausen

4.45 MILES

This barrel-shaped tower – spectacularly lit at night – stored gas to power blast furnaces from the 1920s until 1988. Six years later, the Gasometer…

3. Ruhr Museum

4.56 MILES

The former coal-wash plant at the Unesco-listed Zeche Zollverein provides a suitably atmospheric setting for accessible and engaging exhibits on the…

4. Red Dot Design Museum

4.58 MILES

Part of the Zeche Zollverein colliery-turned-cultural centre, this museum showcases the best in contemporary design in the former stoker's hall,…

5. Zeche Zollverein


A key site along the Ruhr area's Industrial Heritage Trail, the former Zollverein coal mine was a marvel of efficiency while in operation from 1932 until…

6. Dom Essen

5.44 MILES

Essen’s medieval Dom is an island of quiet engulfed by the commercialism of pedestrianised Kettwiger Strasse, the main shopping strip. It has a priceless…

7. Alte Synagoge

5.46 MILES

The grand Alte Synagoge served as the hub of Essen's Jewish community between 1913 and 1938 and miraculously survived WWII largely intact. A memorial site…

8. Museum Folkwang

6.18 MILES

A grand dame among Germany’s art repositories, the Museum Folkwang has sparkling digs designed by top British architect David Chipperfield. Galleries…