Whether you are a casual explorer or a serious history buff, this glimpse into America's architectural past with hands on GPS site coordinates and detailed architectural plans provides a vivid picture of covered bridges. Get an architect's view of covered bridges through the collections of the Historic American Building Survey (HABS) and the Historic American Engineering Record (HAER) - preserving America's architectural history with a diverse range of historic photographs and architectural designs of buildings throughout the country. At one time, there were 14,000 covered bridges in the United States. Today, only 900 of those bridges are still standing, scattered predominently across a few states like Pennsylvania, Ohio, Kentucky, and Georgia. With over 100 photos and many detailed architectural plans from the HABS/HAER website, readers will discover the wooden frame structure of the bridges, as well as be able to compare the different carpentry techniques used to complete each structure. Color photos provide a vivid look at the bridges themselves as well as the beauty of the surrounding landscape. GPS coordinates of many of the locations are also included, courtesy of www.ohiobarns.com, a website maintained by Ohio resident Mike MacCarter.