Smooth rocks? I would normally associate smooth rocks with either water/liquid polished (methane?) or high temperatures. The second wouldn't be the case, so maybe over time the liquid methane has receded. Maybe my eyes are playing tricks, but the surface looks smooth enough still show a low creek. Any geologists out there. I'm pretty limited on this subject.
http://saturn.jpl.nasa.gov/multimedia/images/image-details.cfm?imageID=1301 Huygens at Titan 1 January 14, 2005 This raw image was returned by the Descent Imager/Spectral Radiometer camera onboard the European Space Agency's Huygens probe after the probe descended through the atmosphere of Titan. It shows the surface of Titan with ice blocks strewn around. The size and distance of the blocks will be determined when the image is properly processed. The Descent Imager/Spectral Radiometer is one of two NASA instruments on the probe. The Cassini-Huygens mission is a cooperative project of NASA, the European Space Agency and the Italian Space Agency. The Jet Propulsion Laboratory, a division of the California Institute of Technology in Pasadena, manages the Cassini-Huygens mission for NASA's Science Mission Directorate, Washington, D.C. The Cassini orbiter and its two onboard cameras were designed, developed and assembled at JPL. The Descent Imager/Spectral team is based at the University of Arizona, Tucson, Ariz. Interesting that they call them "ice blocks".
A couple more shots of the 'coastline'. Looks a lot like tidal flats; the tides would be massive on Titan.
The CCDs were designed for low light detection - I believe the light from the sun is about 1% of what it would be here on earth.
In addition to what has already been mentioned ~ the atmospheric pressure would crush anything that attempted a decent.
What are they looking for. I remember them thinking it might be a sea of methane or whatever. I just read that is aboout -250 degrees there. And those pictures by SamFish is funny.