This page contains a hierarchical structure of Travel Topic categories and articles.
Contents are added by the {{PartOfTopic}} template.
Is used in the Travel topics page to dynamically create a list of all articles in in subject, and in calculations in the Wikivoyage:Maintenance panel page (total articles in all sub-categories should match total of articles in top level of Category:Topic articles, if not then a template is missing).
It can also be used to navigate down the breadcrumbs to check if all articles and sub-categories are listed on a topic subject page. The categories can be made visible on pages using Preference:Appearance:Show hidden categories.
If no category exists for the parameter added to the PartofTopic template a small Create category link 
will be placed at the bottom of the article to assist in creation.