The Italian Mafia is involved in nuclear waste trafficking: they have bought nuclear power plant waste and dumped it in Somalia. The Camorrah in Naples do this too. Except they dump it in Naples.
There is a city in Russia so contaminated with nuclear waste, that people check their food with a Geiger counter before purchase.
There is an inscription at the Yucca Mountain Nuclear Waste Repository meant to last 10,000 years, warning future civilizations of the danger lurking below the mountain.