@czechglobalhosts, the Moraine Lake in Banff National Park does it for me, its such a beautiful site to behold.
Its waters are the most amazing colour, a vivid shade of turquoise that changes in intensity through the summer as the glaciers melt. Set in the rugged Valley of the Ten Peaks, Moraine Lake is surrounded by mountains, waterfalls, and rock piles, creating a scene so stunning it almost seems unreal.
My next favorite is the island of Mauritius, such a lovely picture