From publisher blurb: Structures provide a purpose. They may aid a city in its time of need, or provide a place to communicate with the outside world. Whatever the reason, they have many uses and many possible variations, some of which of featured here. This is a supplement for “World Wonders” by Ennead Games. This volume focuses on structures – a form of building or construction that serve a purpose other (or addition) to being a place for business or residence. Example structures include: Levee (minor) - for helping when floods occur Aerial Dock(major) - A multi-purpose tower that can help with airial based commerce and more The Beacon - The ultimate in long range fast, simple communication short of arcane or divine methods