Recently I went on a trip and visited Philadelphia, New York City, New Jersey, Connecticut, Boston, and Providence (Rhode Island, but I was only there for a hour or so). It was a nice trip and I saw some parts of NYC I hadn't seen before. Boston is a really nice city for sight seeing on foot, I wish I could have stayed there longer! I of course brought my camera with me and took pictures whenever I spotted a good car and had enough time to get my camera out.
Update 09/18/07 Boston
Audi RS6 V10 :shock:

Super cool & understated; also a nice cousin of the RS6, Gallardo
997 GT3!; S55 & SL55
A nice sound from this 328 out for a cruise.
Classic Porsche 911 8)
S65, not quite as nice looking as the last model IMO, but still cool
Update 09/15/07 NYC
New York City:
Informal Friday evening car-guy gathering in a suburb of NYC:
Supercharged Viper GTS with
998RWHP on race gas and NOS. Also is one of the very first GTS Vipers, #35. According to the owner, it will scare the shit out of you all the way through 4th gear.
Old Ferrari 308 that has sat idle for 2 years, just look at the poor interior.
Downtown Philly:
TT is this your kind of Ducati?
Muscle Car Show:
Mustang G.T.350, although I don't think its a real one:
Nice group of Motorcycles:
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