Dunno, does it seem like I’ve been doing a whole lot of New York posts lately? Maybe I can’t help myself. After all, it is almost summer, and I have a feeling that it is going to be a great season. Time to do a lot of paddling, to run and bike and hike. And maybe even do some spelunking. Yes, there is far more to New York than what you see on the surface. In fact, the whole underground is rather fascinating. To see what I’m talking about, check out this cool interactive over at National Geographic. It takes a look at the sewers, subways and sinkpipes that make this city what it is.