Continuity mistake: Robin is chasing Red X. Red X throws a net of some kind onto Robin, then Robin says, "I'm fine. Get X. Go." and points toward Red X. Later, we find out that this was actually a hologram of Robin, when Starfire accidentally activates it again. However, this time, the hologram of Robin does not point after his dialogue.
Continuity mistake: The poster behind Beast Boy in the subway station changes colors from one shot to the next.
Chosen answer: It is located in California, as shown in "Teen Titans: Trouble in Tokyo". Possibly San Francisco as seen in the comics.
MasterOfAll