One-liner listings are primarily for navigation in the "Regions," "Cities," and "Other destinations" sections; they should get allow the reader to quickly identify and get to the specific travel guide they want to read. They should not try to provide detailed descriptions or long lists of attractions.
One-liner listings use the following format:
Alphabetic order should be used whenever there's no more appropriate logical order (eg price, distance, north-south, day of the week, etc). Where a non-alphabetic order is used, it should be explained if necessary.
A universal exception to completely alphabetic order is in Cities sections, where capital cities/towns always go at the top of the list.
For immediate subregions and districts, a longer description (two or, at most, three sentences) may be in order, to provide some guidance to a traveller who is trying to decide which region to visit. These listings are not simply for navigation and so need to provide more information than a regular one-liner listing. The same may also apply to "Cities" and "Other destinations" sections, if the region article in question has no subregions; use your best judgement.