Just got this image of the front page of Bike Magazine showing part of a trail in Peru that we like to ride. This ride is "close" to Lima just 4 hours away driving on a narrow dirt road up to 3,550m (11,650ft) and the trail goes all the way to the Pacific Ocean at 0m. The total accumulated descend of this ride is 3,800m (12,470ft.), possibly the biggest descend on earth and this is why everybody gets impressed!
Here are a few pictures more of this amazing ride: