In addition to the Congress Expressway, the building is also constructed over an Amtrak line that runs north-south to Union Station.

So it goes ground, train track, building, highway, building.

In London, there are two fake houses covering where an Underground line runs.

http://en.wikipedia.org/wiki/Leinster_Gardens

Satellite view: http://www.urban75.org/blog/wp-content/uploads/2012/03/leins...

And Helmsley Building (Park avenue Viaduct): http://en.wikipedia.org/wiki/Helmsley_Building

I think that viaduct has been blown up in at least a 1/2 dozen movies. :-)

Difficult to find a decent picture of it but both the Amtrak/NJT trains and Lincoln tunnel offramp pass through 450 West 33rd Street in Manhattan.

http://i.imgur.com/NgeSIDZ.jpg

http://i.imgur.com/bEeGinN.jpg