Cypress Gardens in South Carolina
From http://www.sciway.net/movies/sc-movie-notebook.html
"The lake scene with swans was shot at Cypress Gardens. The animals weren't native to the area, so they were imported and trained 1 month prior to the shoot so they would learn to follow boats and appear on screen as the director wanted. This all had to be done around the month of January so that filming could take place when the resident alligators were hibernating. Visitors to Cypress Gardens taking the walking tour can easily spot the location used in the film."
Looks very pretty!! http://www.cypressgardens.info/