Marble

The ground near the Pont Du Gard was marble which I thought was interesting. Generally marble is considered to be an extravagant building material, but here it is just what is locally available. I guess this explains why the Romans built everything out of marble. On the trails around the Pont du Gard the marble had been worn smooth by people walking on it and it was incredibly slippery. It didn't help that I was wearing Birkenstocks either.