Castle Design Pictures referenced include unit training and projects, command photos and social events are not referenced but may be part of the web site. Some engineer castles show the unit number, others do not.
Some divisional units show the division patch.
In some cases, you have to hunt down these graphics. No links but a complete list of all active and reserve component Army Engineer Units. This is a 150-page, 732KB PDF document including snail mail addresses and many emails. This site tells all. DefenseLINK Photos Looking for pictures representing a current or past Operation, go here.