First off, a correction. On the Waterfront didn't sweep the Big 5 Oscars, just the Big 4. But, as alert trivialyte Heather M (the M stands for Movie Whiz) pointed out, it didn't come out in 1975, either. For some inexplicable reason, I typed "On the Waterfront" instead of the name that was in my head, One Flew over the Cuckoo's Nest, which happens to be the film that swept the cinqo grande in '75. [Insert Adam is cuckoo joke, here.]
Next, I'll award the only partial credit of the day to Charles who correctly answered Grand Teton National Park (1919), yesterday. The other February 26 National Park establishment was Grand Canyon National Park (1909). So the obvious question is . . .
In what U.S. states are Grand Teton National Park and Grand Canyon National Park located?