Parque Nacional Volcán Tenorio

"Nature has blessed Costa Rica in its gorgeous landscapes,fertilefields, and a thousand other bucolic miracles. Río Celeste, for example, is like no other river in the world. This stream gets its sky-blue color from rocksalong its bottomthat are rich in silicon, oxygen, and aluminum, and when the sun strikesthe murmuring waters, the color is sublime. Be sure to visit El Teñidero, the spot where two tributaries merge. Upstream from the nexus, the waters of both are clear, but when they meet at El Teñidero, their chemistry combines tomake a very unusual hue. A one-mile hike leads to a pristine lagoon in similar shades and an overlookabove the bluest waterfall you ever saw. By Travesías"