I'm a little doubtful. It's hard to make a large pretty flat surface out of stone. That looks better than the french paves (which they still lay by hand in some places today), but still not fun without a modern bike.

That still looks very uncomfortable without pneumatic tires.

I wouldn't want to ride on such a road with a racing bike or a normal city bike; but with at mountain bike with suspension and perhaps somewhat fatter than normal tires I think riding there would not be too uncomfortable.