Like other tepuis, Mount Roraima's summit harbors a "lost world" ecosystem that has been sheltered from the surrounding region for about 70 million to 90 million years, according to a 2012 study.

Mount Roraima is a flat-topped formation with crystal-clear pools, waterfalls and a unique ecosystem that has been isolated from the surrounding savanna for millions of years.

Glide over the breathtaking Angel Falls, the world's tallest uninterrupted waterfall, cascading 3,212 feet from the Auyán-Tepui in Venezuela. This stunning drone footage captures the sheer ...