This is old but I don’t care. It still rocks my bones.
mostly because it’s awesome and I have this weird obsession with arctic things.
The Great Blue Hole is a large underwater sinkhole off the coast of Belize that’s more than 1,000 feet wide and 400 feet deep. It formed as a limestone cave system during the last ice age when sea levels were lower, and the caves flooded as the planet warmed and sea levels rose.