Many stations in the historic city center, like here at Bellas Artes, look almost exactly like Paris' famous Guimard-designed Art Nouveau entrances. The system is open from 5 am to midnight and only has two tracks in each direction — which means no express trains like in New York. There's also a re-loadable card you can buy, but most people seemed to favor the paper tickets.On that TV, a piano cover of A-ha's 1985 hit Take On Me was playing. Unlike New York though, people seemed more willing to help someone find their stop, or get off the train when they needed to.The two newest lines run on metal wheels and look more like European subway systems.Where else can you walk the entire world timeline scaled to a 5 minute walk?I'll admit that I only rode the trains a handful of times over five days, but in that time I experienced no delays or service changes (the likes of which are are now all too common in New York City.) What's more, the language barrier caused no issues whatsoever — something that any foreign visitor to New York would likely say is a big headache for figuring out the complicated system. All things considered, Mexico City's metro gets a full 10 of 10 rating in my book.