Where is the largest bayan tree located and how big is it ?

The largest Banyan I believe is in Thailand...Don't remember exactly how large, but it coveres something like 5-8 acres...
The largest one in the US is about 40 miles north of me in Ft.Myers at the Thomas Edison Home....
A Banyan tree will spread itself not by underground, but rather sending out branches , then dropping roots that looks like thin ropes, and after touching ground, it will grow into a tree, and so on, and so on....

Check this out

google banyan largest

hectare = ~2.47 sq miles