Videos exploring the hidden or hard-to-reach places in WoW are what really got me interested in the game many years ago. While watching some random videos today, I stumbled upon Hayven Games, a channel devoted to finding the really hidden stuff. Take the above video for example - a look at an alpha version of Ironforge with two tiers, an entirely different Great Forge area and tram lines running to both Stormwind and Gnomeregan.
My interest in WoW dropped right around the time Hayven's channel began, so it's no wonder I haven't noticed this awesome channel until now. I'll certainly be sinking a few hours of free time into these videos, taking in sights of things that never saw the light of day. There's just something about seeing these alternate/hidden versions of the game I find intriguing, even though I have no interest in the title itself anymore. Nostalgia obviously plays a part of it, but I think it's more about imagining what could've been.