An October 2017 aerial view of some of the many islands in Casco Bay, off Portland, Maine. Like several outposts in far-off Alaska, some of these islands depend upon mail and ferry boats for their supplies and written correspondence

Set of images depicting various harbors, ports, and piers together with ships, fishing and sailing boats, and all types of haven-like places and views. All large image sets on Picryl.com are made in two steps: First, we picked a set to train AI vision to recognize the feature, and after that, we ran all 25M+ images in our database through an image recognition machine. As usual, all media in the collection belong to the public domain. There is no limitation on the dataset usage - educational, scientific, or commercial.