article_snippet: The subway's third rail famously carries 625 volts of electricity and touching The subway's third rail means likely death for New Yorkers who don't listen to announcements reminding passengers 'do not go on to live tracks for any reason'. ''
article_snippet: Gregory Bergpictured) goes down onto the tracks of the subway, but makes sure to be careful and avoid touching the third rail, which carries 625 volts of electricity .
article_snippet: Other spots are only reached by long walks on tracks underground.
article_snippet: Beyond the dreaded third rail and police, there is always the threat of an approaching train in stations that cars still run through without stopping.
article_snippet: Some hidden parts of the New York City subway system, which has been operating for more than a century, are only reached by long walks .
article_snippet: New York City's subway has dozens of closed stations and platforms in addition to more than 400 active ones.
article_snippet: The New York City subway has more than 400 active stations, but there are more that have fallen out of use since the system began in the early 20th century .