These magnificent gardens are one of the state's most popular attractions. The verdant waterfront kingdom has 248 acres, with groomed trails winding through forest, meadows and ornamental gardens blooming with both native and exotic plant species. The storybook-themed children's garden, opened in 2010, offers interactive fun, with water-spraying whale sculptures, a pond with rowboats and a winding grass maze. Don't miss a reading from a costumed Miss Rumphius, the lupine-planting heroine of the classic Maine children's book of the same name.