Located in the Apuseni Mountains, Romania: Roșia Poieni copper mine (open pit copper mine, with the largest copper reserve in Romania and the second largest in Europe) and Sesei Valley Lake (Iaz decantare Valea Șesii) with the colorful (cointaining toxic substances, chemical elements) water waste from the copper mine, that flooded the Geamăna village.

September 1, 2016
See also:
Romania From The Top (all posts) | Bucharest From The Top (all posts)