Seville is flat, compact, and almost entirely walkable. The whole of the old town, the Barrio Santa Cruz, the cathedral quarter, the Plaza de España and María Luisa Park, and even Triana across the river are all within a 20-minute walk of each other. Many of the narrow streets are pedestrianised or too tight for buses, and the easiest way to get around is on foot. When you need a ride, the taxis are cheap and honest. Seville has the most extensive bike-share system in Spain — Sevici — with docking stations all over the centre and a network of segregated bike lanes that makes it easy and pleasant to cycle everywhere. There is one Metro line, useful mostly for reaching the outskirts, and a tram (MetroCentro) that runs along Avenida de la Constitución through the heart of the old town. Don't rent a car: parking is difficult, theft from cars is common, and you won't need one unless you are driving on out of the city.