Urban Rust

When you walk around a city, you don't expect to find Cor-Ten steel---weathered steel alloy with a protective coat of rust---on facades. You expect to see it in industrial areas or an occasional modern single-family home. A post on A Daily Dose of Architecture provides a nice opportunity to see Cor-ten steel at work on city buildings.

For more views of Cor-Ten, Flickr has a group dedicated to it!