About 2 hours outside of Cobán is Semuc Champey which a series of waterfalls that you can swim in. It was similar to Agua Azul but the main difference was the lack of development surrounding the area. There are just the paths leading to the falls and the water which is various shades of torquoise.
The strangest thing about the pools are the gazillions of little fish that would nibble on you if you stood still for too long. The first time you feel them, you can't help but screech like a geek until you realize that they don't actually hurt you.
The swimming holes were deep and the perfect temperature. What a lovely spot!
On the way back to Cobán, we stopped at Lanquin Caves. Apparently, if you're an experienced spelunker you can cruise for more than 5 hours into the caves and find lava pools...crazy! The color of the river flowing through the caves was absolutely beautiful if not somewhat surreal. It was almost as if someone had put dye into the water.