Most bike tours have their high and low points.
But here's a bike tour that had nothing but high points. Steve Wilson and Patricia Lebensohn rode 1,000 miles from Tucuman, Argentina through Bolivia to Cusco, Peru. To get there they spent four straight weeks above 10,000 feet, rode on the the world's largest salt flat in Bolivia at 12,600 feet, and at one point reached 14,300 feet.
As if that weren't enough, they hiked on the Inca Trail and visited Machu Picchu.
Beyond the challenge of getting accustomed to the elevation, there was the cold (most nights were just a little above freezing), some extremely windy days, and long distances between accommodations.
see photos of a part of the world that few people ever visit: exotic and remote, but with tons of nice people, from innkeepers to fellow tourists.