Belgium - Major Mining Sites of Wallonia

"The four sites of the property form a strip that is 170km long by 3 to 15 km, crossing Belgium from east to west. It consists of the best-preserved 19th- and 20th-century coal mining sites of the country. It features early examples of the utopian architecture from the early periods of the industrial era in Europe within a highly integrated, industrial and urban ensemble, notably the Grand-Hornu colliery and workers’ city designed by Bruno Renard in the first half of the 19th century. Bois-du-Luc includes numerous buildings erected from 1838 to 1909 and one of Europe’s oldest collieries dating back to the end of the 17th century. While the Walloon region had hundreds of collieries, most have lost their infrastructure, while the four components of the listed site retain a high measure of integrity. "

- Grand Hornu
- Bois du Cazier 

- Blegny-Mine
- Bois-du-Luc

Source: UNESCO World Heritage

in bold - collected postcards of these subsites

in red - looking for postcard from this subsite

Postcard 1 - Bois du Cazier
Le Bois du Cazier, Marcinelle, Belgium. Thanks to Gerda of Belgium.

Postcard 2 - Grand Hornu

Houses of the engineers on the oval courtyard of the former coal mine of Grand Hornu, Belgium. Thanks to Gerda of Belgium.

Postcard 3 - Blegny-Mine

Blegny Mine - a UNESCO World Heritage site in Belgium. Thanks to Gerda of Belgium. Postmarked August 24, 2020 and received in Penang island on September 17, 2020.