I remember seeing this pool as a child. It once had the most crystal clear deep-blue color to it.

Although still quite clear and still colorful, it was sad to see how much it has changed over the years. Tourists have thrown pennies and other trash into it changing it's composition and color. If "we" would have known decades ago how it would damage the pool maybe time alone wouldn't have changed it this drastically. I would love to see that deep blue water again. I might have to dig up some really old photos. See how my photography skills compared back then. ;-)

Here is my entry for #colourfulphotography hosted by @photocontests.