English Heritage book of Hadrian's Wall

the long version

Stretching 73 miles from coast to coast and reaching a height of 20 feet, Hadrian's Wall should have been counted as one of the seven wonders of the ancient world. Today it stands out as the most imposing Roman monument north of the Alps and attracts millions of visitors each year. ... With over a hundred maps, plans, reconstructions and photographs as well as a gazetteer of the key places to visit, this is the complete companion to Hadrian's Wall -- whether you wish to study it before or after a visit, or whether you are simply an armchair archaeologist. -- from book jacket.