"One of Madrid's longest-standing markets—it opened in 1882—Mercado de la Paz is a Salamanca icon. It's also a bustling maze where vendors know the names of their customers' kids—"Has Paco finished his Master's yet?" "What ever happened to Elena's deadbeat boyfriend?"—and where the best cuts and finest seafood are reserved for loyal regulars. Be sure to sample a €3 slice of earth-shatteringly good tortilla española from Casa Dani; with its gooey center and overabundance of caramelized onions, there's truly nothing like it." - Benjamin Kemper