From Wikipedia: The TD Centre comprises a collection of structures spread across a granite plinth, all regulated, in three dimensions, and from the largest scale to the smallest, by a mathematically ordered, 1.5 m2 (16 sq ft) grid.

These houses are built on infill over the Garrison Creek that is shifting over time.
Come on an urban exploration walk this Saturday (Nov 23) and see these houses – 2pm outside Christie subway station.

Black Creek is an urbanized water body in the lower portion of the Humber River watershed. Sections of it have been channelized with concrete structures to convey water through the area faster, reducing flooding.

The fire hydrant is unusual as most stations just have fire extinguishers. On another note, take a close look at the concourse level ceilings – they are just wood painted blue!