All of Barcelona’s trains have featured ... Cities like New York—which has the world’s fifth-largest metro system, with 472 ...

Sixteen stations of Barcelona’s subway system ... An average of 2.3 million people take the Barcelona metro on any given workday. This clever program comes while doubts are emerging about ...

Driving is not recommended. Diamond-shaped signs wearing an "M" mark the locations of Barcelona's Metro stations. This underground rail system serves much of the city on eight color-coded lines.