Kinda the same pattern we have around Moscow. You can't fly over the city, so the only way to get to the other side is to keep strictly over a road that goes round Moscow in a circle. Only clockwise path is allowed, atlitiude limits roughly the same, chat with ATCs of 3 major airfields while trying to keep away from power lines which pop up below, because the city is on hills and airfied weather staions are at a distance from it, so given pressure and altitude aren't always 100% safe. Oh, and direction limit and restricted city airspace do not apply to rescue choppers than can fly as they please + on occasion one of the airfields has their airliners on final approach pattern at 1000ft right above your head.
I've been there once and I want another go... such a thrill