Spotted along the Malecon in Havana, this piece of limestone, whose softer elements have been washed away by years of water, looks almost as if it were soft ribbons of lace.
Desert View Watchtower, Grand Canyon National Park, Arizona
A visit to the Desert View Watchtower on the eastern portion of the Grand Canyon’s South Rim. Constructed in the 1930s, it offers magnificent canyon views and a tie to the Native American history of the Canyon.
Coral was my first thought, but the identification is from my wife, a retired earth science teacher.
Very porous and beautiful! Sure that isn’t coral, Paul?
I thought it was a fossilised Cuban Dinosaur Brain – but I know nothing !