Commonly Used Hidden Lists or Objects

Question

What are few commonly used Hidden Lists and Objects that we should know of in Sharepoint?

Answer 1

using (SPSite site = new SPSite("http://localhost"))
using (SPWeb web = site.RootWeb)
    foreach (SPList list in web.Lists)
        Console.WriteLine("{0} - {1}", list.Title ?? "(noname)", list.RootFolder.ServerRelativeUrl);

I get:

Cache Profiles - /Cache Profiles
Content and Structure Reports - /Reports List
Converted Forms - /IWConvertedForms
Documents - /Documents
Form Templates - /FormServerTemplates
Images - /PublishingImages
List Template Gallery - /_catalogs/lt
Long Running Operation Status - /Long Running Operation Status
Master Page Gallery - /_catalogs/masterpage
Notification List - /Notification Pages
Pages - /Pages
Quick Deploy Items - /Quick Deploy Items
Relationships List - /Relationships List
Reusable Content - /ReusableContent
Site Collection Documents - /SiteCollectionDocuments
Site Collection Images - /SiteCollectionImages
Site Template Gallery - /_catalogs/wt
Style Library - /Style Library
User Information List - /_catalogs/users
Variation Labels - /Variation Labels
Web Part Gallery - /_catalogs/wp
Workflow Tasks - /WorkflowTasks

ps.: Publishing enabled, MOSS Enterprise

Answer 2

It may not be a terribly helpful answer, but my experience of Sharepoint development has indicated there are so many holes to fall down with the non-hidden and occasionally even documented lists and objects that wandering into the rocky territory of hidden ones is asking for trouble.

Answer 3

Long Running Operations Status list.