Cold, rainy, poopy weather didn't bother us because we spent the morning underground in the Luray Caverns where some of the formations are estimated to be 4 million years old.
The first four photos are not of stalactites (-tites = top) and stalagmites, but of stalactites reflected in a pool of very still water.
White coloring is produced by calcium deposits, grey by manganese (and something else we can't recall) and the orange by iron.
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The caverns are huge, some rooms as tall as ten stories. Note the small guide in the middle and cavern visitors on the right.
A light has been placed behind this feature and shines through the paper-thin deposit.
In the afternoon we returned to Shenandoah National Park where we spent the night in a bear den. It was very scary and there was no wi-fi.
We went for a walk in the woods.
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