
This annual downhill bike race involves a madcap full-speed descent through the streets of Valparaiso, Chile.
Riders must navigate tight turns, 15 foot drops, flights of stairs, and all the inherent dangers that come from putting a race track right in the middle of a populated city.
The race, which started in 2003, is held in the form of time trials rather than head-to-head competition, and since the course runs through some major city streets it's not actually set up until a day or two before the event, giving the riders no time to practice before it begins.
According to one rider, “…we are basically going into the jumps blind since they probably won't even test them until the day of the race.”