Tokyo GEO-Site Project

I found this today on Mari's blog, Watashi to Tokyo. She always has interesting stuff on her site like this:
Tokyo GEO-Site Project is an awesome look into the underground ducts and tunnels under the huge metropolis. Its in QTVR, so you'll need Quicktime to view it. the views are incredible. Its like straight out of the Matrix or Ghost in the Shell or something. Makes me feel like playing a video game and i don't know why...