Vukovar, Croatia, 2002: Vukovar was utterly destroyed after a three month seige against the mostly Croat defenders by the Serb-dominated Yugoslav Army (JNA) in November 1991. Some estimates are that Serb gunners fired a million shells into Vukovar destroying 15,000 buildings. It was the first European city since WWII entirely leveled to the ground. At least 3,000 people were killed and 20,000 “ethinically cleansed”  The city was still a jigsaw of destruction 10 years later. Exploring was out of the question as the city was littered with landmines and unexploded ordance.