A prime example is the Italian Market. A semi-outdoor public market, it is also a bustling commercial street with a somewhat ramshackle quality, attracting locals and tourists alike for staples and famous destinations, from fresh ricotta to cheesesteaks. Most importantly, however, is the variety of visual interest at the ground level. Walking just one block in the Italian Market delivers innumerable things to look at, high and low, beneath European-like porticoes. Stalls and supplies spill out into the street in vibrant, organic fashion — the kind of “street ballet” famed urbanist Jane Jacobs would have been proud of.