The Golden Gate is a photo I found on a clip art page somewhere on the WWW.
Some of the small icons came from the large collection of improvement icons by Harlan.

Each zip contains three files:
  XXX_l.bmp:  Large image, replaces the ##imp.bmp files
  XXX_m.bmp:  Medium image, cut and paste into Improvements.bmp
  XXX_s.bmp:  Small image, cut and paste into Icons.bmp

