The header background is the city of Seattle. The designer describe it as a design: 

“with stretching horizontal border. Also incorporates a great javascript free thumbnail enlarger”.

Although the image thumbnail that enlarges can break the flow in the right column, you can easily opt not to use that javascript function. This template is suitable for all kinds of blog, especially if you are an urban person. To see this template in action with some Adsense placement ideas, go to this preview here.

Adsense Placement Ideas
This template is more like a 4-column layout design. For better click through, you can try put Adsense on the first and 3rd columns. Leave the second and right-most column for your own content. Ads on the first column are usually the most visible while the ones on the third column will blend in well with the rest of the content.