Did you know? Height of Mt Washington, highest point in NE USA (1.917 km) is 5 x Height of the Empire State Building (NYC) (381 m)
Length of the St Lawrence Seaway Canal system (600 km)
/fact/length-of-the-st-lawrence-seaway-canal-system
Link
If this was a standard unit ...
Yes, there's now a book based on these numbers. Oxford University Press: July 2018.
Click here to learn more about it.
Click here for Podcast: Andrew Elliott interviewed for New Books Network.