They are fairly common. I saw several in Ohio when I was a kid... I remember these.. 18 ft diameter..
https://www.metroparks.org/places-to-go/sugarcreek/
https://www.dayton.com/places/park/dayton-oldest-sisters-are-550-years-old/P5nypeTBMZNzbGnbcxQteM/
There are banyan trees, oaks, and cypress trees in Fl. WAY over 6 all over the place...
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