The Salar de Uyuni (Uyuni Salt Flats) in Bolivia is a 4,000-square-mile pan of salt crust, formed from prehistoric lakes and inhospitably tucked more than two miles above sea level. Dried out, it looks like this:
The Blue Lagoon, Iceland, is a geothermal spa. The outdoor bath remains 100-110°F year round. The natural ingredients of the warm water: mineral salts, white silica and blue green algae. These ingredients clean exfoliate, nourish & soften the skin while relaxing the body.
Hillier Lake, Western Australia: The pink and lovely Hiller Lake is the only vividly pink lake you will find in the world. The color is permanent and never changes, even when water is removed and placed in a separate container. Its startling color remains a mystery and while scientists have proven it's not due to the presence of algae, unlike the other salt lakes down under, they still can't explain why it's pink....
The Salinas Grandes, Argentina: Deep in the desert, you might think this massive dried-up lake is a field of snow-- but upon closer inspection it becomes a 80-square-mile salt flat that glistens like a giant mirror when it rains. The Salinas Grandes are difficult to get to, but people will probably start making the trek once they're over Bolivia's Salar de Uyuni salt flats, which are much more well-known and heavily touristed.