The latest press release and images from Cassini seem to hint at there being a large impact crater on Titan (see attached image) Titan has a diameter of 5100km, so if it is an impact feature it's huge, i'd say at least 1000km in diameter maybe more.

Definately looks like a huge crater!

But with such a dense atmosphere...I find it hard to imagine. But it really really looks like a crater!

um,I wouldn't go that far It vaguely looks like a crater but after seeing the upclose image I'm not so sure. then again, Titan's environment may have serious messed up the morphology on impat basin that size. However, some people have claimed to see a central peak in the VIMS and particularly the ISS images, and all I have to say is that I have never seen a basin that large with a central peak, ridges ringing the center sure, but not central peaks

I'm going to eat my hat on this. Perhaps it isn't a central peak, but something like Vahalla and the bright spot is a central bright palimpset