Haniel Halden Sludge Pile

The Haniel slag heap was formed from waste rock from the Prosper-Haniel coal mine. It is located within the city limits of Bottrop and allows visitors to climb to a height of 185 meters. The northern section of the Haniel slag heap remains inaccessible due to ongoing dumping operations. The area of the Halden that is open to the public spans 114 hectares.

The ascent to the summit of the Haniel Halden follows a Way of the Cross, which depicts the Passion of Christ in 15 stations, designed by the artist Tisa von der Schulenburg. Along the way, historical mining tools are also on display, offering insights into the region’s past. At the highest point stands the cross by Oberhausen artist Adolf Radecki, which marks the end of the Stations of the Cross. This monument commemorates Pope John Paul II’s visit to the region in 1987.

A central feature of the Halden is the amphitheater on its summit, which is used for cultural events. The installation of the “Totems”—colored railroad ties by Basque artist Augustín Ibarrola—adds striking visual accents along the edge of the Halden. From this elevated vantage point, visitors can also enjoy a sweeping panoramic view of the surrounding landscape, which includes, among other landmarks, the Bottrop Tetrahedron and the Hoheward Halden in Herten.