Knowledge: The largest watermelon is located in China while the biggest waterfall is the Horseshoe Falls that lies on the border of the USA and Canada.

Conversation:
My moms family lives in upstate New York, when I was a kid I got to walk over to the Canadian side and had the most beautiful view of Niagara Falls. Only went once but I remember it like it was yesterday. Do you know anything about it or have you seen it?
I know that it is the collective name for three waterfalls that straddle the international border between Canada and the United States.
I remember a bunch of people used to try to go down it in barrels, talk about an intense way to die. Sorry, did I just get morbid with this? Anyway, it's huge!
From largest to smallest, the three waterfalls are the Horseshoe Falls, the American Falls and the Bridal Veil Falls
Oh, I didn't know that. So where is the largest waterfall located?

Response: Ah yes, the Horseshoe Falls lies on the border of the USA and Canada.