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.

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.

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 ...