[Finnick grins. This guy is witty, he really digs it.

He leads them under an old abandoned wharf that's half-fallen apart, and goes around behind a large rock. On the back of the rock is what looks like a pool of water shimmering like a soap bubble.]

Don't worry, you'll see what I mean soon enough. This is the portal- if we go through, it'll deposit us somewhere random in the city. From there we can go where we want.