The cinematography and production design in Gattaca 
So much of the movie takes place in just 2 sets (the house, the facility) yet you never get bored because of this, it's really impressive.
Then when the movie leaves those 2 sets for some key emotional moments it enhances the catharsis because you're breaking free of the mundanity like Vincent is trying to with his con.
The club, the solar array, the beach, the race.
