Floating islands are a popular motive in LEGO, most often coupled with steampunk or similar themes. Andrew JN goes just a little bit back in (alternate) time with this colonial themed floating rock. The scene represents a heavily guarded prison fort and a flying ship. While the ship does not look especially like a floating one, it is unique enough that it does not look out of place in the sky. The prison actually looks so nice, it makes me want to commit some heinous acts of piracy in the skies.