Create a 2.5D dungeon

It's about the perspective you look at it. It could be done with 3d models on 3d world or 2d graphics on 2d surface.

http://en.wikipedia.org/wiki/Isometric_projection

Thanks Jo.

So it boils down to me deciding whether I should create it on 3D or 2D.

I have some programming background (C++ and java) still consider myself beginner in programming.
And I downloaded iOS Xcode to start development.

I am wondering what tools should I look into to create a dungeon map.
Where to download these programs, etc.

I did some research and here are some of the few 3d Engines that I consider downloading.
SIO2, Unity3d, ShiVa 3d.

Can anyone advise me which of these 3 are beginner friendly?
I tried Unity 3d and went through their beginner tutorials and videos, and I felt that maybe there are other engines that are easier to pick-up.

My plan of using this 3d engine is to create an app that can create dungeon based on the user's input.
eg: if I want a 10 tile dungeon, the app will create a 10 tile dungeon.

If you're targeting mobile platform i would suggest just pick emulator and start write some code.
By writing from scratch you get best optimization. Personally i suggest to write your own code . Should not be so hard.

Good luck.