My wife and I are here in Australia for The Amazing Meeting, and we took an extra day to make a sidetrip to Uluru (aka Ayers Rock), the largest known single piece of rock in the world. It's a giant piece of sandstone that was upthrust and is now tumbling in the alluvium, though it's probably done tumbling. Rock solid, you might say. For your entertainment and amusement, I took a series of 3D pictures of it.
These are the kind where you need to cross your eyes, not the kind where you converge your gaze behind it. In other words, your left eye needs to look at the right picture, and vice versa. Some people have trouble with this method, but it works for me, so that's what I did. :-)
Click to see the large version of each. Enjoy…
This last one isn't actually of Uluru, but of a nearby formation called Kata Tjuta (“many heads”, aka The Olgas) which many people find even more impressive: