3DLasvegas.com

I'm not sure if everyone has run by this,
but its essentially a 3D model of las vegas.
It's also kept pretty up to date, as the walgreens is already in existence.
check it out..
As for building heights, I'm still figuring out if we can extract it from the website.

http://www.3dlasvegas.com

I'm convinced there has to be a way to extract these models, as it's linked with 3D warehouse of the "software that shall not be named"