In the games files there is an unused Pit or Arena Called "Windhelm Pit Entrance". Entering the Pit spawns 2 Argonians (Both Male), Nords, Dark Elves and Imperials NPCs, They are all called 'Pit Fans', who are supposed to be spectators. It is believed that Windhelm was going to have an arena at some point of development where you would face against animals or NPC Bandits. There are also Pit guards who are fully voiced, but they cannot be viewed during normal gameplay. The place can be viewed by entering the console commands "coc WindhelmPitEntrance" and "coc WindhelmPitExterior".

The leader of the Thieves Guild, Mercer Frey, has the same voice actor as another well known thief, Garrett from the Thief series. Both are voiced by Stephen Russell.

In the Heroic Fantasy book 'The Name of The Wind' by Patrick Rothfuss, the main character Kvothe stumbles at one point (Page 22 in the attached PDF) and says "I took an arrow in the knee on my way through the Eld three summers ago" The book was published in 2007 and might be where Bethesda got the line from. If this is the case, then 'arrow in the knee' may be an Easter egg or reference to the novel.

The quest "Mind of Madness" has parallels with the story "Alice in Wonderland", where Alice is instructed by The Mad Hatter to do several menial tasks while he has a tea party. When you do finish the quest, you get the staff of "Wabbajack", a reference to the poem "Jabberwocky".

There is a room in Skyrim that holds the corpses of all deceased, unique NPCs. The room can only be accessed through the use of console commands, and has four exits that lead to a black void. Should the dead character be resurrected through console commands, most NPCs will be hostile towards the player.

By using console commands and editing the game's files to disable the game's boundaries, it is possible to travel outside of Skyrim's map. Going out far enough south, it's possible to find an untextured place-holder for the White-Gold Tower where the Imperial City should be, as well as the overall landscape of Cyrodiil around it.

The quest "A Night to Remember" may be a reference to the movie The Hangover, as both involve characters getting hungover and retracing their steps to find out what happened during the previous night.

According to pre-production concept art, Chaurus were originally planned to be mounts for Falmer riders.