There are many types of Interiors, ranging from Great Smials and Bag End to giant World Instances. (Today that is the case, but all instances should really go into another categories per region. There are also outdoor secluded locations within settlements which use this category, also these should better go into another category per region.)
Basically, an Interior may be entered. Some Interiors are possible to enter only during a short period, while having certain quest(s) or alike, or if meeting the requirements for instances. Some Landmarks are also Interiors and then the Interior template is used but the page is manually added to the Landmark category.
Category for all interiors.
This category has the following 17 subcategories, out of 17 total.
Pages in category "Interiors"
The following 2 pages are in this category, out of 2 total.