The abandoned city of Pripyat

When a nuclear accident destroyed much of Power plant number four at Chernobyl, the resulting radioactive cloud spread across much of western Europe, leading to restrictions on milk and farm animal consumption from affected areas, many of which have only been lifted in the last 5 years. Meanwhile, 5 km's from the reactor was a modern city called Pripyat, housing many of the plants workers and families. It remains uninhabitable for 20,000 years.