In one of my recent articles for Conde Nast Traveler, I wrote about the most colorful bodies of water around the world. One of the items that made my list was the incredible salt ponds at the Don Edwards San Francisco Bay National Wildlife Refuge. Here, they're captured by photographer Julieanne Kost. These evaporation ponds can take on an array of colors depending on their salinity and what microorganisms are living in them. Kost caught them in radiant purple and the photos are absolutely stunning.