Bolivia's 424,164 square miles make it the 28th largest country in the world. Those square miles are also some of the most biodiverse in the world, with ecologies ranging from tropical rainforests to dry valleys to stepped savannas. It rises from just 230 feet above sea level along the Paraguay river to higher than 21,000 feet at the peak of the extinct stratovolcano Nevado Sajama on the country’s western border. And I was there to challenge a wide swathe of it all. Over nine days I was slated to cover 1,240 miles, not conquering the big country but merely surviving it, creeping along some of the most dangerous roads in the world one grueling mile at a time.