A stroll through these streets is a revelation of incredible urban beauty. Brightly painted 18th-century buildings, many adorned with Lisbon’s trademark hand-painted tiles and ornately wrought iron balconies, line steep stone-laden streets complemented by decorative granite sidewalks. A crisscross of wires overhead gives power to the electric streetcar system that has been in service since 1901. Hilltop parks offer magnificent vistas of city and seaport. Enormous monuments contrast with incredible street art, giving the entire city the feel of an open air museum.