Chiho Aoshima's City Glow (2005).

From the website:

City Glow, installed near the N-R subway lines, is a multi-panel graphic work in which futuristic skyscrapers--transformed into demure, humanlike creatures--stand amidst lush tropical vegetation.

This particular one is on the 14th Street/Union Square station.

See more: Link | Previously on Neatorama: Chiho Aoshima's Graveheads and the Gushing Zombies.