Photo albums on Facebook have long had a text input field for location, but until recently, there was no way to put in structured data in this field (like a Facebook page). We added that ability earlier this year, and the "add a location" feature just performs a search on whatever text the album owner put in originally (ranked by place popularity etc) and suggests the first result as the location of the album.
Henry F. Bridge, Product Manager, Facebook
Photo albums on Facebook have long had a text input field for location, but until recently, there was no way to put in structured data in this field (like a Facebook page). We added that ability earlier this year, and the "add a location" feature just performs a search on whatever text the album owner put in originally (ranked by place popularity etc) and suggests the first result as the location of the album.