Item 25116 - Riverton Park, Portland, 1924 Item 25116 - Riverton Park, Portland, 1924 Contributed by Maine Historical Society/MaineToday Media Item 25116 Zoom 4387px x 3393px - 14.6"w x 11.3"h @ 300dpi | Need a larger size? *Credit line must read: Collections of Maine Historical Society/MaineToday Media Image Info One of the amusement park rides at Riverton Park in Portland. The park was originally opened by the Portland Railroad Company in 1896. It closed for a short time during and after World War 1 and reopened in 1923. Show Details