Portland, Italy
Lambert Gardens was a botanical garden of over 30 acres (120,000 m2) in the Reed neighborhood of Portland, Oregon, USA. It opened in 1930 and closed in 1968 and had a total estimated visitor count of 2,000,000, most of them believed to be out-of-towners.
Listen to the audio guide for Lambert Gardens Free on WIP — starts by itself when you arrive, even with the screen off