What Would a World Without People Look Like?

(Source: see story cited below)

There are various collections of photographs of ghost towns and abandoned buildings on the Internet. Here is a collection of such photos from The Atlantic. The introduction to the photo essay reads:

For a number of reasons, natural and human, people have recently evacuated or otherwise abandoned a number of places around the world -- large and small, old and new. Gathering images of deserted areas into a single photo essay, one can get a sense of what the world might look like if humans were to vanish from the planet altogether. Collected here are recent scenes from nuclear-exclusion zones, blighted urban neighborhoods, towns where residents left to escape violence, unsold developments built during the real estate boom, ghost towns, and more.