Unobtainable keys

The following keys cannot be obtained by the Dragonborn. They are listed in the Creation Kit.
* Avanchnzel Key
* Bloodlet Cage Key
* Cage Key (1 of 2)
* Captive Shackle Key
* Cellar Key
* Chillrend Case Key
* Crossinghouse Key
* Doesn't Exist
* Faldar's Cage Key
* Folgunthur Catacomb Key
* Fort Blackmoor Prison Key
* Irkngthand Arcanex Key
* Iron Key
* Jaree's Key
* Key to the Abandoned House	
* Key to Aleuc's House
* Key to Argi's Hut
* Key to Castle Dour
* Key to Castle Dour Tower
* Key to Falion's House (1 of 2)
* Key to Fathendas House
* Key to Gestur's House
* Key to Gularz Khazgur Keep
* Key to Heigen's Farmhouse
* Key to Jens' Farmhouse
* Key to Justiciar's Headquarter
* Key to Longhouse
* Key to Maiden-Loom Manor
* Key to Morthal Guardhouse
* Key to the Nightgate Inn
* Key to Pavo's House (1 of 2)	
* Key to the Silver-Blood Inn
* Key to Solitude Cemetary
* Key to Styrr's House
* Key to the Temple of the Divines
* Key to Traillus's House
* Labyrinthian Crypt Key
* Liar's Retreat Cage Key
* Mistwatch Jail Key
* Nightgate Inn Cellar Key
* Prison Cell Key
* Raldbthar Key
* Syncope Sanctuary Key
* Valthume Chamber Key
* Verner and Anneke's House Key
* Werewolf Cage Key
== In The Elder Scrolls V: Dragonborn ==
There are a few duplicate keys present in the Creation Kit entries for the Dragonborn DLC which also cannot be obtained. They tend to be duplicates of other identically named keys.
* Severin Manor Key (1 of 2)	
* Tel Mithryn Apothecary Key (1 of 2)
* Tel Mithryn Kitchen Key (1 of 2)	
* Whiterun Jail Key (1 of 2)
 
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