Site allworldwars has some fascinating picture galleries of the fighting in the East in WWII:
PANZER ARTILLERY REGIMENT 78 IN RUSSIA, 1941/42: PHOTO COLLECTION
ROMANIAN AND GERMAN TROOPS IN BESSARABIA, UKRAINE AND CRIMEA, 1941-42 (3 parts)
You can find more collections at their site.
Also englishrussia.com (link found through commenter Joe Public) has some nice galleries, such as
Unusual perspective on WWII
PANZER ARTILLERY REGIMENT 78 IN RUSSIA, 1941/42: PHOTO COLLECTION
ROMANIAN AND GERMAN TROOPS IN BESSARABIA, UKRAINE AND CRIMEA, 1941-42 (3 parts)
You can find more collections at their site.
Also englishrussia.com (link found through commenter Joe Public) has some nice galleries, such as
Unusual perspective on WWII