This is old news, but some resourceful mod creators have redesigned the land of Cyrodiil — from Elder Scrolls IV: Oblivion — using the Skyrim Creation engine. In other words, you can play Oblivion within Skyrim. I’ll save you the inevitable “yo dawg” Exhibit memes.
If you want to see it in action, check out this 45-minute — yes, it’s really that long — gameplay trailer. White-Gold Tower looks sexy as hell.