These cities have been ravaged by time, war and natural disaster. At least one may just be the product of human imagination. Why are we so fascinated with lost cities -- and what makes them lost?
There's no doubt that the world's deserted cities have seen better days, but what caused these mass evacuations? Whether you're walking through the rustic ghost towns of the American frontier or the cities torn apart by environmental and industrial mishap, abandoned cities are fascinating views into the past. How much do you know about the world's most famously forgotten places? See more »