On the east coast of the Philippine island of Mindanao is a saltwater river that’s so crystal clear you can see the bottom. The Enchanted River is named after diplomat Modesto Farolan’s poem“ Rio Encantado.” It is surrounded by thick jungle all along its 300-meter path to the Pacific Ocean. The likely source of the river’s brilliant blue waters is an underground cave system that was first explored in 1999. Like many beautiful places, the Hinatuan Enchanted River attracts crowds of visitors. A few years ago, the local government took action to manage tourism in order to protect the environment and keep the river beautifully clean.