The Citadel of Bam (ارگ بم) - Kerman Province, Iran. The largest adobe building in the world.
The Arg-e Bam also known as Bam Citadel, traced back to at least the Achaemenide Empire (sixth to fourth centuries BC). This is how it looks after the 2003 earthquake. 70% of all buildings plus the citadel itself was destroyed. The citadel was rebuilt in 2016.