Took Book & did some exploring in Beta for Cataclysm. Got some screen shots to share.
Again spoiler warning……………….


Here you’re looking at the remains of the Park in Stormwind.

Stranglethorn Vale is being split into 2 zones & this is the scene in the middle.

Sentinel Hill has received a few upgrades. There is now a wall being built around it.

The Loch in Loch Modan is going down. In fact it’s almost empty. You’re looking at the old fishing pier here.

This is the reason the Loch has drained. The dam is broken.

Because of the dam breaking Menethil Harbor is flooded. It’s still there & so is the quest givers you are just wading through water to get there.
Got anything you’re curious about seeing what changed?