TIL Ontario's boundary with the United States runs 2700 kilometres on water and only about one kilometre on land.

https://en.wikipedia.org/wiki/Height_of_Land_Portage#Geography
#til #todayilearned
https://www.reddit.com/r/todayilearned/comments/1gwrex2/til_ontarios_boundary_with_the_united_states_runs/