The recent TEW2 rumors kick-started my sleuthing habits again, while trying to find some info regarding TEW2 I stumbled upon unreleased TEW concept art.
What surprised me most, is that all those concept arts are done by Freelancers, it seems Tango outsourced a LOT of TEW's art assets.
From Daniel Rudnicki, freelancer from Poland: http://imgur.com/a/zsQUm
From Christian Bravery, freelancer from the UK: http://imgur.com/a/bbZtl
From Kirk Quilaquil, freelancer from the UK: http://imgur.com/Fz8YtlG
And there is Lu Cheng, Freelancer from China... we posted his concept arts years ago when it leaked, but in-case anybody missed it: http://imgur.com/a/ojD1m
From what I can tell, there was a harbour + ship segment that was planned, but didn't make it in the final game.