It is always a pleasure to visit a city that has a good Metro system. As I cannot really walk everywhere and it is good that I can hop on the subway and go to amazing places when I visit a City. I like how I can take the subway from Downtown area directly to the Airport from Zone A-D. Fast and convenient. The Zone system works well as you really paid for how far you travelling compare to one fare for all. Next time when I visit Valencia again, hopefully I can spend more time exploring the City and I definitely will be using the subway more! PS. The staff at the Colon Station was really nice, even shown me how to pass back to use our ticket. with a smile on his face!