Trivia: If you look very closely when Superman is floating in Lex Luther's swimming pool, you'll notice a small floatation device placed under his cape to keep his head above the water. That's because Superman boots weighed a whole lot after they became filled with water. The floatation device made it easier for Clark Kent to swim during that scene.
Trivia: Goldfinger director Guy Hamilton was originally going the direct this film, which was to be shot in Italy. A combination of financial issues and a warrant being issued for Marlon Brando's arrest due to his role in the highly controversial Last Tango in Paris lead to production relocating to England. Hamilton had become a tax exile from the country and was forced to drop out of Superman.