Ubuntu :: Script Supposed To Check If There's A Folder - Create If It's Not There

I have a script that takes a location and does something to them then creates new files in the supplied location. I was trying to get the script to create the location if it didn't exist, but i can't figure out why it won't work. Here's what i've got right now

Code:

#!/bin/bash
destdir=$1
[[ -z "$destdir" ]] && { echo "No destination parameter supplied, exiting"; exit 1; }
[[ ! -e "$destdir" ]] && { echo "$destdir does not exist, exiting"; exit 1; }

[code]....

when i run the first one, it works if the supplied folder exists. If i try with my modification with a name such as /media/place/Foo bar, it creates a folder called Foo in the supplied dir, and bar in the dir i'm in when i run the script. the -p flag on mkdir creates parent directories btw.