Portland's sewers right as rain, by Dennis Cauchon (USA Today)
The most surprising tourist attraction in Portland, Ore., is its storm sewer system.
Eco-friendly tourists flock to the city to understand how Portland's innovative system of curbs, gutters, roofs and rain gardens sharply cuts water pollution.
Friday, April 02, 2010
Portland, Oregon: Steering tourists "to the most exciting storm sewer sites."
Thanks to JP for the link.