CDMX Post Office

We have visited Mexico City (CDMX - Cuidad de Mexico) at least half a dozen times, but never set foot inside the post office. I was out walking by myself when I stumbled upon this magnificent structure. An incredible interior, to which this photo does not do justice, of what looks like gold, but I'm certain must be some less expensive metal. It is only half used now that the internet has taken over the world's communications, but remains stunningly beautiful.