This is a jumping off point—snapshots of unique societies and small-scale landmarks. It is not all-encompassing, so use it as a tool to initiate your own exploring and take from it what you find useful. Included in this memoir are: third world cities for the save-the-world-types, futuristic metropolises for techy millennials, and a few endearing capitals of design for the subtle romantics. Here is a 20-something’s guide to the world.