08/03/2013 Tough Miles Blog 23: Argentina & Chile... The final stint, with only 21 days till Christmas. By this stage we had ridden through 24 countries, covering over 25,000 miles. The question remainsâ¦..did we make it to Ushuaia, Tierra del Fuego, commonly regarded as the southernmost city in the world?Day 217, Friday 14th December. We…