Explorers as a part of the Great Maya Aquifer Project discovered a connection between two large underwater ... cave represents the most important submerged archaeological site in the world ...

Why it's incredible: The cataract is the world's biggest waterfall ... The Denmark Strait cataract isn't the only known underwater waterfall, although other documented cascades can't compete ...

it certainly has made a name for itself as the largest waterfall in the world. At around 11,500 feet, water gushes down a slope from the cataract to its bottom, which is over three times the ...