Everyone has their own idea of a "blue lagoon". (A happy place of refuge away from the world) What's yours?

In Yosemite valley, at the base of half dome, take a left turn past the stables, and follow the trail up Tenaya Canyon about four miles, to find a place called "Hidden Falls" by the locals, a fifty foot waterfall in the end of a bowl canyon that is made by the snowmelt on the peaks and sides of "Cloud's Rest" to the left of Half Dome. Seldom would visitors ever get this far from the valley floor, so it was secluded and extremely peaceful.