A friend just forwarded me a link to some very impressive pics of Stockholm’s Tunnelbana stations – apparently, they’re known as “the longest art gallery in the world.”

Not owning a car, and being a dedicated urban traveler, I’m a big fan of public transportation, and not just for the ability to get around faster and more cheaply, but for the typically slick-but-simple design package that goes along with it, too. Ergo,

Perhaps as a response to the recent heat wave, when NYC’s normally odoriferous subways must have risen to a whole new level of rankness, the Gawker crew are asking their readers to submit info about the particular smells of subway stations.

Here’s one more way your iPod can help you travel below the radar on your next urban vacation, this time while traveling underground.