It's called the Great Blue Hole. Scuba divers and snorkelers have ... And so we know that this was a big, dry cave, and it was during a really prolific era on Earth, so there were probably lots ...

Like a pinprick piercing the azure Caribbean Sea, the Great Blue Hole is as mysterious as it is mesmerizing. From above, this almost perfectly circular underwater sinkhole is a deep, dark bullseye ...

This finding suggests that the Great Blue Hole was once a dry cave that formed around 14,000 years ago. It was later flooded and collapsed after the Ice Age ended when sea levels on Earth rose ...

Declared a UNESCO World Heritage Site in 1996 – along with six other areas surrounding Belize's barrier reef – the Great Blue Hole remains one of the world's most distinguished scuba sites.

Here’s what you need to know before visiting the Great Blue Hole. Like a pinprick piercing the azure Caribbean Sea, the Great Blue Hole is as mysterious as it is mesmerizing. From above ...