South American cuisine pizza, being closer to calzones. Pasta and polenta are common in Argentina and on the Pampas generally. Empanadas and choripán are very popular fast food in Argentina and Uruguay. Churros, ensaïmada, alfajor, Spanish tortillas with potato, meatballs, sopa de mondongo, and puchero are Spanish derived Pampas cuisine. Mate is also found on the Pampas. Early South American restaurants in the United States included Caso do Brazil in Reseda, California, which opened in 1955, and the Machu Picchu nightclub in Miami, Florida, which opened in 1963, serving Peruvian dishes such as ceviche and anticuchos. South American foods are increasingly imported into
Kilometre per square kilometre For cities, most cities are rounded by a motorway ring, so the density metric is dependent on the size of the city: EU-15 had 48.3 km of railways per 1 000 square kilometres in 2000), more than in the United States (30.6 km/1 000 km2 in 1999, including Alaska and Hawaii and inland waters) but less than in Japan (53.5 km/ 1000km2 in 1999). For rail networkds, in Europe, the highest network density can be found in the Czech Republic, Belgium, Luxembourg and Germany (above 100 km/1 000 km²), followed by the Netherlands, Hungary, Austria, Slovakia, the United Kingdom and