Wikivoyage:Links to Wikipedia
Wikivoyage articles should be as complete as possible in and of themselves. Essential information about a topic should be included in the Wikivoyage article, rather than relying on a link to Wikipedia.
Many articles in Wikivoyage can benefit from links to Wikipedia articles on the same subject. A Wikivoyage article focuses on the issues facing travelers for a destination, but Wikipedia articles can have deeper or broader information on a topic. For many non travel-related terms or topics, Wikivoyage will not and should not ever have an article, since it is not an encyclopaedia.
To add a link to a Wikipedia article on the same subject, use the form [[Wikipedia:Article title on Wikipedia]], eg, [[Wikipedia:Paris]].
The link will not appear in the main text of the article page on Wikivoyage, but will instead show up automatically in the "Related sites" section of the left-side navigation panel.
Avoid adding more than one Wikipedia link; the link you add should be to an article on exactly the same topic.
The External links guidelines do not permit links from Wikivoyage articles in the Main namespace (travel articles) to Wikipedia articles (except in the "Related sites" menu), as they are not primary sources.
To make an in-line link to a Wikipedia article from a policy page, a personal page or a talk page, use w: (an inline link to the same-language Wikipedia) or put a colon in front of the "Wikipedia", like this: [[:Wikipedia:Article title on Wikipedia]].
There are versions of Wikipedia for many different languages. Linking to most of them from English-language Wikivoyage doesn't make a lot of sense. After all, our target audience are English speakers who likely won't understand a linked article in Tamil or Estonian.
In addition, don't count on Wikipedia-style interlanguage prefixes to work for links to Wikipedia language versions. We have our own multilanguage sites here at Wikivoyage, and fr:Lyon points to the French Wikivoyage article about Lyon, not to the French Wikipedia article about Lyon.
If, on a policy page, a personal page or a talk page, you need to link to an article on Tagalog Wikipedia (or something similar), you can make a shortcut using the form [[:w:language code:title]]. So, the Tagalog article on Spain is at w:tl:Espanya. (Conversely, [[voy:London]] from an English-language wiki or [[:en:voy:London]] anywhere else should get you back to English-speaking Wikivoyage territory, namely our page on London, from elsewhere in Wikimedia.)