"It's a big city. I can't be everywhere." Trophy in LEGO Batman: Legacy of the Dark Knight

The fast travel points are Subwayne stations, one in each of the nine districts. The first, in Tricorner, opens with the story in Chapter 1. Not every district is open until Chapter 3 is done, and many stations sit behind puzzles that need characters you get later. Open them after the story. A district's radio tower, hacked as Batgirl, marks its station on the map.