Of all the travelblog sites, TravelPod is a pretty good one. As an example, take a look at this amusing entry from SteveF, and a group of forthsomething guys, about their adventures exploring Roraima and the Gran Sabana: Terribly Lost in the Lost World. It sounds like an interesting trip, particulary with their guide Roger:

And finally we have Roger, who is already drunk in the car on the way to the starting point for the hike. Well, it’s 10AM after all. Just brilliant.

We set off towards Roraima, and loose Roger after about five minutes of hiking. I guess he fell asleep in some creek, anyway we won’t see him again before the next day.

But, they finally do make it to the top where they spend four days camping and exploring:

The rocky landscape on top of Roraima is some of the most magical, spooky and freakish I have ever seen. It truly is the Lost World. It’s mostly labyrinths of black rock (Sandstone according to Ed and Roger and Granite according to the BesserWisser), sand and lots of endemic plants and small living creatures. And the vistas from the highest point on Roraima (the Ford Maverick point), right on the edge of the mountain, is out of this world. The green and beautiful Gran Sabana as long as the eye can see. When it is clear that is, as I have never seen clouds and fog move in and out faster than up here. It all adds to the spookiness.