Castaway Islands

The  were four islands on the planet Safehold.

Geography
Located in the middle of the Great Western Ocean, almost four thousand miles south of Safehold's equator, the largest island was slightly under two hundred and fifty miles long; the smallest was barely twenty-seven miles long. Aside from a few species of arctic wyverns and seals, there were few signs of life. None of the islands were ever named individually.

History
Starting in February of the Year of God 895, Merlin Athrawes used the islands as a testing ground for the devices simulating steam engine activity to the kinetic weapons platforms in orbit of the planet.