small scenario:
ok think of games like Portal or wow portals. you see a door but at the outside of the door is different nature or climate. when you enter you will still be yourself only you just walked in two spaces (winter time of Norway to summer of Australia) you can still see Cold winter-breeze coming from other side of the door gets vaporize by the hot temprature of Australia, while not conflicting with the machine mechanism.
do you believe its possible to create this in the future to travel? or do you believe in other ways can be created?