The Bois du Cazier, in the Marcinelle district of Charleroi, is the site of the worst mining disaster in Belgian history and one of the most important industrial heritage sites in Europe. On 8 August 1956, a fire started underground and killed 262 of the 274 miners at work that day. The site is now a UNESCO World Heritage property and houses three museums.
The Industrial Museum occupies the restored mine buildings and documents the history of coal extraction in the region, with machinery, photographs, and personal items left by the miners. The Glass Museum in the adjacent building covers the equally important glassmaking industry of Charleroi, a skill brought to the region by Venetian craftsmen in the 17th century. Both are excellent. The Art Museum rounds out the complex. The preserved headframes and slag heaps are visible from the entrance — the scale and silence of the site is affecting. Allow at least two hours.