Sedimentary Pipe in Kodachrome Basin State Park, Utah

Quoting from Wikipedia: Kodachrome Basin State Park:

The geologic interest of the park are sandstone spires and columns called sand pipes, believed to be found nowhere else on earth. Differing geological explanations of the features in Kodachrome Basin State Park exist. One explanation is that the area was once similar to Yellowstone National Park with hot springs and geysers, which eventually filled up with sediment and solidified. Through time, the Entrada sandstone surrounding the solidified geysers eroded, leaving large sand pipes. Sixty-seven sand pipes ranging from two to 52 meters have been identified in the park.

I have seen most of the sixty-seven pipes in the Park. The area where the pipes are located is primarily inside the Park but you can spot several outside of the Park area including some that are not completely eroded out of the matrix. There a many such interesting areas spread over the entire state of Utah.