The Clue Crew person (I forget which one) posed in front of Shoshone Falls, asking us to guess the state they're in (it's in?), which is Idaho. But she pronounced it Show-Shown Falls (/ʃoʊˈʃoʊn/). I believe that may well be the first time I've ever heard it said that way.
I wondered if it was an acceptable variation, so I looked it up. Hah! It's not. The two listed are Shuh-Shownee and Show-Shownee - \shəˈshōnē, shōˈ-, -ni\ in Merriam Webster's pronunciation spelling, or /ʃəˈʃoʊniː/, /ʃoʊˈʃoʊniː/) in IPA. Myself, I've always said the first, but I've heard it both ways.
Just not the Jeopardy! way.