The Plane of Air is a near-endless void with nothing but air, interspersed with solid or even liquid objects that you can build a habitat around. Unless the party consists entirely of Air Genasi and Airbodied, and the DM likes doing open-field encounters, most adventures on the Plane of Air will take place in some kind of construction or on some kind of island, usually both. Regardless, there are towns and dungeons in these places. Indeed, digging inside of them is the only way to actually get a reasonable defense, so there are actually a lot more dungeons per land area (nevermind volume) than there are on the Material Plane. Also, until the entire party has a way to fly, towns on the Plane of Air are a lot more confining than towns on the Material, but, thanks to sewers, old-town ruins, a