Really hard! A bit of random guessing though. Missed the same as scambigol, but forgot to look at the alphabetical listing until there were only 5 seconds left, doh!
This is also on the world map, it just seems slightly more pronounced here for some reason. I think it's the spit that separates Songkhla Lake from the ocean, which doesn't seem to have a name
Until Iceland happened
I got all of
them.