The teleporter in the fjords gets you just below the building; you still have to climb up the ladder.
If you don't have a save before entering the building, email Larian (support@larian.com) with your current save and they can put you back inside the building.
The first time I entered that building I must have gotten knocked back during the fight, since I suddenly dropped straight down. With no way back trough the barrier, I reloaded the save I had just made (a good practice before entering any new area).
In XP the saves are in the folder
C:\Documents and Settings\ %username% \Local Settings\Application Data\Divinity 2\Savegames
or in Vista / Win 7
C:\Users\ %username% \AppData\Local\Divinity 2\Savegames
You may need to set Windows Explorer to show hidden files and folders.
For the Xbox version, AFAIK you would need one of Microsoft's stupidly expensive, proprietary memory cards to get a save off of it.
