The Pororoca is an Amazonian tidal bore that generates waves up to 12 feet high which can last for over half an hour. Surfers from all around the world have visited Brazil in order to ride this mega-wave. Here are some videos:

The Pororoca Phenomenon (4:28)
Pororoca 1 of 2 (3:11)
Pororoca 2 of 2 (3:21)
Pororoca (26 minutes long)

The Real North Pole Expedition is a journey to the bottom of the Arctic Ocean, to the actual North Pole, using research submarines, tentatively scheduled for the summer of 2008. Spots are still available. And if that doesn’t interest you, they have other expeditions that might.
posted on Oct 21, 2006 - View this thread

Tanya Streeter is a champion in the sport of competitive freediving. Anyone who can dive to 400 feet and return using muscle power and fins, or to 525 feet below the surface of the water using a special sled, on just one breath of air, has won my undying respect.
posted on Oct 19, 2006 - View this thread

Kira Salak is a writer who embodies an old-fashioned spirit of adventure. She has kayaked the Niger River solo; during her time in Africa, she freed a slave. On another trip, she sampled Ayahuasca in the Peruvian jungle. At the age of 24, she trekked alone through the tribal violence of Papua New Guinea. Her work is a wonderful alternative to the blandness and narrowness of contemporary consumer society, in which there is nothing new to be discovered and everything can be reduced to lucre.
posted on Oct 17, 2006 - View this thread