While on the Koh Phi Phi boat trip I saw an amazing natural phenomenon I can only remember seeing once before, a rainbow around the sun.
It's called a halo. I spent nearly 30 seconds researching the phenomenon through google and learned it is a circular rainbow caused by ice crystals in high cirrus clouds. Ice! It was about 147 degrees Celsius in the sun that day and I'm looking at a rainbow caused by ice?
It covered the whole sky, so there was just no way to get a complete photo of it, especially with a crappy camera, without burning out my eyes in the process. I was blown away even further when a perfect second ring formed.
It was a startling, breathtaking sight, but perhaps more surprising was that no one else on the boat cared! I was sitting in the front of the boat with a bunch of drunken Finns. Maybe they drive to work every day with the Aurora Borealis blazing overhead, and that's why they weren't impressed. Or, more likely, they were too drunk to see it or care.
But as for the rest of the people on the boat ... Do these people live in places where dinosaurs roam freely and volcanoes erupt miles into the atmosphere every day? How could you not be impressed by this?
Sheesh.