This is entirely common, all over the world. Maintenance, accesses, and vents to the New York subway system are hidden behind non-existent town and row-houses a

This is entirely common, all over the world. Maintenance, accesses, and vents to the New York subway system are hidden behind non-existent town and row-houses and you can discover them if you pan around Google Maps for awhile. http://www.messynessychic.com/2013/01/29/the-fake-townhouses-hiding-mystery-underground-portals/ http://www.messynessychic.com/2013/01/29/the-fake-townhouses...