Creating separate scenes for one game

I'm new to Unity and was wondering if there was a tutorial that shows how I could take two scenes and use them as one game. For example, if a player comes to a building that they wanted to enter, they would walk up to a door and hit a button that would load up a second built scene that would be just the inside of the building.

Thanks

You should create two scenes and after saving them add them to "file->build settings" list either by dragging them or click on "add current" button. then you can use Application.LoadLevel() to load your level whenever you want. hope that helps.