The Graffiti Highway in Centralia, Pennsylvania. The entire town was abandoned when an underground fire broke out, and as a result, so was the highway that ran to it. All from a coal vein that was lit 40 years ago that still burns to this very day. (source)
Oleg at his horse`s remains, 1899, Viktor Vasnetsov
Mausolée des Évêques-de-Trois-Rivières. Jean-Claude Leclerc & Roger Villemure, 1965-66