Best "one size fits all" zone?

[Crass]

Recently, I've been hunting based on how scenic the zone is rather than the ZEM or drops. I highly recommend this.

I also make games, and I'd like to make a game level inspired by an EQ zone or region.

It's all got me thinking, what zone(s) would be the most "one size fits all" as in, a wide variety of monsters to fight, with varied and interesting terrain?

Like if the entire game had to be just one or two zones, which should it be?