The lifeless moonscape of Canada's oil sand strip mines. A vast vortex of plastic floating endlessly around the Pacific. An eerily abandoned town square in a radioactive Ukrainian wilderness. These are places the tourist boards would rather you didn't see. The places that don't show up in any guide books. And the places that, six years ago, journalist and film-maker Andrew Blackwell set out to explore. ''Visit Sunny Chernobyl'' is the wry, funny, sometimes poignant tale of his trip through the world's most degraded environments.