http://news.bbc.co.uk/1/hi/world/europe/1062037.stm Read the entire article
http://www.newseum.org/berlinwall/two_sides_one_story/index.htm Choose the html version
http://www.wall-berlin.org/gb/berlin.htm Especially look at the maps on this one
http://www.dailysoft.com/berlinwall/photographs/index.htm Extra website, look at the photographs of the Wall