I just realized there was an alchemy shop in Riften!! What have you guys discovered that you have never seen before?

The Reach.. I NEVER wen't anywhere near that area on the map until like a couple weeks ago and I've had this since launch. To me it was pretty much non-existent.

Everything. I'm being somewhat factitious, I know, but after a while, you know where everything is. I'll never feel like I did when the game was new. I remember when I came across that skeleton north of the tower stone, buried in snow attempting to plant a flag into the ground, with a copy of Knights of the Nine next to him. I kept wondering if it meant something, but nothing ever came from it.

I've only just found Old Hroldan, an inn in the Reach. Heck, I've only just started exploring the Reach, even after hundreds of hours.

I too have only just found Old Hroldan, thanks to a misc objective given to me by a farmer in Markarth!

I've only just discovered Karthwasten. In fact I've explored virtually none of the Reach, or the area around Dawnstar, for that matter.

Helgen!

Just found Dragonbane on my fourth playthru of the main quest. I never even noticed that side room before.

I find loads of new things all the time, and there's plenty of quests and dungeons I haven't seen yet. I've played almost no other game since 11-11-11, 8 characters and 1,232 hours

I have been waiting to play for the DLC to come out since December. I thought I'd seen basically most of the game's regions, but I just now learned about wispmothers in a forum post. A totally unique enemy I never knew was in the game.

Ever found the 'Mead with Juniper Berries' in the ruined Helgen inn?
'I wonder if Vilod is still making that mead with Juniper berries mixed in ...'

I now that was lame, but...

As a matter of fact I did. On my third character...I think.

Plate armor this past weekend and my first piece of orc armor a pair of enchanted boots last week.