On three days each year, you can ride from 72nd and Park to the Brooklyn Bridge, without cars.
Now, it's not necessarily as wonderful as it sounds, cause bike riders and pedestrians can be fairly mindless, so you have to ride even more carefully than you would if there were just cars, cabs, buses and pedestrians (and a sprinkling of other bikes) -- the normal fare on NYC streets.
But there are moments on the ride that are just bliss. Riding down the hill from 34th St to 14th St weaving in and out, without stopping, is a rush.
I thought I would get up at 7AM and beat the crowd, but that didn't happen. Instead I got out just as it was ending, so it wasn't all that bad. And I rode back uptown on the Hudson River bike path, which is practically empty, or so it felt today.