While my wife Peggy was off cruising through the Caribbean with our daughter Tasha and visiting Mayan ruins on a mother-daughter excursion, I traveled south some 60 miles from our home near Leesburg, Virginia to the small town of Luray in the ShenandoahValley. My motel was in an ideal location. A 15 minute drive east took me onto Skyline Drive with its fantastic fall views of Shenandoah National Park. A 15 minute drive west took me to Luray Caverns. I’ve already featured the fall colors of the Blue Ridge Mountains. Today, I am going underground to focus on the colors and mind-blowing rock structures that are found in what is considered the best and largest cavern on the eastern coast of the US.

A Smithsonian report in 1880 stated: “It is safe to say that there is probably no other cave in the world more completely and profusely decorated with stalactite and stalagmite ornamentation than that of Luray.” Several, such as Mammoth and Carlsbad in the US, and others throughout the world are equally unique, but I can guarantee that visitors to Luray will not be disappointed.
My first thoughts on the colors, as shown in the above photo, were enhanced by colored lighting, but I learned that Luray emphasizes natural-looking illumination which includes “neutral and cooler white as well as amber-toned lighting designed to highlight the rock textures, calcite, and crystal formations.” Also, while Luray Caverns is privately owned, it is designated as a National Natural Landmark. Along with this designation comes the requirement that colored lighting not be used. Presently, Luray is switching to LED lighting, which it claims will replace older, harsh lighting with “softer illumination that will highlight geological details while supporting cave preservation.”

The drop of water isn’t just water. It’s a weak carbonic acid formed when rain water absorbs carbon dioxide from decaying vegetation. As it seeps down to the caves, the carbonic acid passes through a layer of lime rock, dissolving and absorbing some of it to create the mineral calcite (calcium carbonate). Upon reaching the cave, a portion of the carbon dioxide is released into to the air, which reduces the amount of calcite the water can carry. The calcite precipitates out of the water in a circle, beginning or continuing the creation of the stalactite and a tube that carries the water.


White is the natural color of calcite, so where do the colors come from? In addition to absorbing carbon dioxide and dissolved lime, the water also absorbs traces of the minerals it passes through. These minerals create the various colors: Reds and yellows come from iron and iron-stained clays, blacks from manganese dioxide, and blues and greens from copper compound solutions.

Speleothems of this size require huge caves. Their creation was also caused by carbonic acid water. It doesn’t seep down from above, however. It follows fractures in the rock underground and dissolves the limestone and dolomite along the way, creating chambers and passage ways. When carbonic acid water filled these chambers, as it did in its prehistoric past, it continued to dissolve the limestone and dolomite helping form the large caves of today.










Now, random photos that continue to emphasize the formations and color that make Luray Caverns famous.


















Next, Peggy and I resume our posts about our summer travels in Scotland, Ireland, and Greece.




























