National Geographic : 1989 May
Gripped by "tepuifever," the authorjoined six expeditions to the region between 1984 and 1988. On the first, guide Jose Miguel Perez (left, far right) and Pem6n Indian assistants wait out a lightning storm on Roraima. Reached in an all-day climb, it can be scaled without mountaineeringgear. Speeding tepui research, heli copters serviced this camp on Cuquenan (below). One foggy day George walked a minute from his tent and was lost in the rocky chaos for hours.