I had not really thoguht much about taking a trip on the Beagle Channel but decided to take a 2.5hr boat trip which was great. You get to go around the lighthouse that is where the Atlantic and Pacific oceans meet, see seals, Cormorans, and penguins: although not in September as they are breeding or something. The views back to the mountain range and the town of Ushuaia are great. It is also fantastic to be at sea level and looking at snow covered mountains rising so high above you. It does feel the end of the earth..next stop Antarctica.