15 Spectacular Dive Sites You Have to See to Believe

Whale Diving Tonga

15. Great Blue Hole — Belize

Robert Scales / Flickr: raincitystudios

Eric Pheterson / Flickr: pheterson

According to researchers, this is the biggest blue hole — underwater cave or sinkhole — in the world. It’s more than 984 feet across and it’s estimated to be 410 feet deep. This site is very popular amongst divers who like to explore the geological formations of the coral reefs.