Where on Earth?
Belize
GPS Coordinates: 17°18′N 87°32′W
From the air, Belize’s Great Blue Hole appears as a perfectly circular void amid the speckled corals and shallow crystal waters of Lighthouse Reef. A mysterious blank in the seascape nearly a thousand feet across, it dwarfs the dive boats that meander in and out from the open sea. Gazing down, it’s impossible to see the bottom, over 400 feet below the waves. Instead, there is only…