Would love to see, as a companion piece, “US Counties More Populous than Rhode Island”.
A website that shows how much shadow any point on the earth gets at any time, any day of the year.
You do have to zoom in quite a bit to see the effect of shadows cast by buildings
You can use it to find your local “henge” date where the sunset lines up with your east-west street direction.
Oh, thanks! This is helpful!
For planning your garden?
Indeed!
Not far from Leadville, which has the country’s highest airport! If the airport’s rotating navigational beacon counted as a lighthouse (which, ok, it isn’t) then that would take the record at 9,934’.
Visible (for humans) light, radio waves… it’s all ER and a navigational beacon is a navigational beacon…
I’m talking about the one that uses visible light. Spins around and alternates between white and blue, I think. Alas, there’s no “house” attached to it.
It’s a lighthouse made of gridwork 
Hmmm…
People who live in lighthouses shouldn’t throw shade…and people who live in grid houses shouldn’t throw axes. 
(Maybe I need more coffee)
A special iron-trussed lighthouse was ordered from France for Valassaari Island. The lighthouse was designed by Henry Lepaute, who a few years later also created the iconic Eiffel Tower in Paris.
Obligs
By coincidence, I was just reading a mystery story set on a screw-pile lighthouse in England. I believe this is one of the few of this design left in operations.
ETA: I was wrong, the Alligator Reef Light is not a screw-pile design. But I’m not deleting my post