I have seen fewer places with more beautiful blue waters than the Caribbean and especially the waters of the British Virgin Islands at Tortola. This particular picture was taken with a pocket Nikon S6 as we took a ferry towards Virgin Gorda, one of the most beautiful places I have been. The blue water at the dock was cleaner and more beautiful than anything even in a swimming pool or bath tub we can imagine.
The boat's propellor's churned the ice-colored but perfectly mild water into shades of teal, turquoise and literally made you say aquamarine.
Location: 18°25'9.30"N 64°37'1.46"W