Bustling Quartieri Spagnoli is a commercial hub skirted by Via Toledo, a part-pedestrian street lined with mainstream and designer fashion stores. Trattorias and food stalls selling fried pizza are scattered nearby. As well as several churches, like the 16th-century Santa Maria della Mercede a Montecalvario, the area houses the entrance to Napoli Sotterranea, an underground network of tunnels and catacombs.