this may be surfing’s last frontier, a 10-foot wave that travels for hundreds of miles up the amazon river. it sounded like an incredible thing to try someday, until i got to the part about the candiru…

Surf the Amazon:

There are hazards: the wave picks up enormous logs and other jungle debris as it rolls along, and a wipeout can put a surfer in the middle of them. The pororoca also can suddenly split off and sweep far into the jungle up one of the Amazon’s many tributaries. Surfers also have to worry about alligators, anacondas, piranhas and the dreaded candiru, a tiny fish that swims up the penis of humans and lodges its extremely painful, spiny fins in so firmly that removing it usually requires amputation.

(via swallowing tacks.)