Fun with trigonometry – the world's most twisted coastline

1 · Erik Bernhardsson · July 12, 2017, 4 a.m.
I just spent a few days in Italy, on the Ligurian coast. Even though we were on the west side of Italy, the Mediterranean sea was to the east, because the house was situated on a long bay. But zooming in even more, there were parts of the coast that were even more twisted – to the point where it had turned a full 360 degress so you ended up having the sea to the west again. Anyway, that made me curious – what’s the world’s most twisted coastline? If you trace the coastline along the Eurasian l...