Santiago's steady economic growth over the past few decades has transformed it into a modern metropolis. The city is now home to a growing theater and restaurant scene, extensive suburban development, dozens of shopping centers, and a rising skyline, including the tallest building in Latin America, the Gran Torre Santiago. It includes several major universities, and has developed a modern transportation infrastructure, including a free flow toll-based, partly underground urban freeway system and the Metro de Santiago, South America's most extensive subway system.