I tend to think of Kaieteur Falls as that "in between" waterfall that doesn't quite have the width and power of the Big 3 (Iguazu Falls, Victoria Falls, and Niagara Falls) nor the height of the tallest waterfalls in the world (e.g. Angel Falls or Yosemite Falls). Still, it's taller, wider, and more powerful than most other waterfalls in the world and definitely ought to get more props than it presently gets.
But perhaps more impressive than its size is the fact that it sits in a nearly pristine rainforest atop an ancient plateau known as the Guyana Shield. What's so special about this geological quirk is that it's said to be the oldest layer of rock on earth at 2.99 billion years. We got to witness some rare wildlife such as the dimunitive golden frog and a type of plant that attracts and digests insects (no wonder why the area seemed devoid of biting insects!) though the forest also supports jaguars, numerous birds, and even monkeys as well as a multitude of bromeliads and other plant species. Indeed, we didn't see any signs of civilization (including roads) around the waterfall itself except for a few buildings and a tiny airstrip nearby its top. So it's perhaps the closest thing to seeing a reasonably accessible waterfall in its most natural settings as you can get these days.
There is some human habitation in the area by the native Amerindians. In fact, Kaieteur Falls is said to be named after an Amerindian chief by the name of "Kai" who gave his life by canoeing over the falls. Apparently he did this in order to protect his tribe from a rival Carib tribe by means of divine intervention (i.e. I guess the Great Spirit would intervene if Chief Kai sacrificed himself). The word "teur" means falls in the native Amerindian language.
So you may ask how do you go about seeing this world wonder? Unfortunately, with all things that are worth while in life, you'll have to earn it. I've put up a pair of supplemental pages to give you an idea of how we had to handle the logistics of visiting the falls...
Finally, there are a few ways you can experience this waterfall. The most common way (which is explained in one of the links above) is to do this as part of a day tour out of Georgetown, Guyana. It's gonna involve flying so it's not exactly an eco-friendly means of getting here but there are few other options given how untouched the Potaro Plateau is. There are also multi-day tours (minimum of 3 or 4 days) concentrating on the falls involving some boat travel towards the rarely-visited base of the falls as well as a strenuous trek to the top of the falls.
Below are some photos we've taken of the mighty Kaieteur Falls from the various viewpoints near its top as part of a typical day tour.