I was reading the notes on http://disney.wikia.com/wiki/Arendelle when I noticed it listed Rapunzel as a visitor to the land.
So naturally, I was curious as to how and why this was happening.
The link lead me to this webpage:
http://disney.wikia.com/wiki/Rapunzel#Frozenl
Direct link isn't working properly, so click Contents [Show] and click on Frozen.
Now remember to look out for it when you see Frozen!