How did I not know this?

[jon-nyc]

It seems like the kind of thing you’d learn as a kid.

[wtg]

Remarkable.

On a semi-related note...

Map of the Highest and Lowest natural elevation in every US county

[Daniel]

There's a large difference between 0 and 999 ft. as any Floridian can tell you.

Interesting.

[Bernard]

The map doesn't go below sea level.

[Daniel]

Hawaii Island (a county) is listed as 13,000- 13,999 ft. This is radically incomplete and essentially worthless to the viewer.

[wtg]

@Bernard said in How did I not know this?:

The map doesn't go below sea level.

I fixed my OP. I had copied/pasted their original heading, which said it represented highest/lowest. OTOH, according to the legend, the map actually just shows the highest elevation in each county. I can't think of any place in the country where the highest elevation is below sea level.