The South Pacific Island of Palau is famous for its Jellyfish Lake, but this year's crop is unlike anything we've ever seen.
Yes, I know what you're thinking: Jellyfish have stingers and you'd have to be absolutely nuts to swim through swarms of them like this. But this particular species, the golden jellyfish, has been isolated in this lake for thousands of years — and without its natural predators. These jellies have subsequently lost their stingers.
The remarkable video comes via The National: