It's train, for several reasons.

The map has several entry points into A site, in which you can surround the enemy. The back entry point (Ivy) is a tight chokepoint, but if you get through, you can sneak behind the enemy on both sites.

B site is a bit tougher to entry to, but once you get into site, you have so many angles you can navigate through.

The real beauty of the map is that in clutch situations (1vX or even 2vX), you have the ability to cross the map without the enemy seeing you by sneaking through trains. You can go from A main to Hell undetected, and sneak into the back halls. Other maps don't have this mechanic and it makes clutch situations boring, relatively speaking.

Bring train back.

Wrong, it’s Cache, solely because simple hit a nutty clip and I want to see that done again in a grand final!

de_lake

Old Cobble! This is one of the greatest maps ever. New cobble is shit.