Did You Know?

The Great Blue Hole off Belize’s coast is deep enough to swallow two Boeing 747s stacked on top of each other.

This massive underwater sinkhole is 1,043 feet deep and 1,000 feet across. Formed during several episodes of quaternary glaciation, the hole contains stalactites formed in a dry cave before ocean levels rose. It offers unique insights into sea level changes and holds perfectly preserved cave formations from the last ice age.