The world’s smallest park is the size of a flower pot and sits in the middle of a Portland, OR, intersection. Mill Ends Park was supposed to be a light pole, but when the pole never showed up, a journalist planted some flowers, wrote leprechaun stories about it, and started calling it ‘the World’s Smallest Park’. 2 years later, it became official: the park was dedicated on St. Paddy’s Day, 1948. Source Source 2