Medellín has a functional and widespread free public bicycle system called Encicla (www.encicla.gov.co). You'll need to register first and pick up a 'Civica' card in any one of the these metro stations: Niquía, San Antonio, Itagüí or San Javier. A network of bicycle paths links many of the stations.
Medellín is well serviced by buses, although most travelers will find the metro and taxis sufficient for their needs. The majority of routes originate on Av Oriental and from Parque Berrío. Buses stop running around 10pm or 11pm.
Medellín's metro is Colombia's only commuter rail line. It opened in 1995 and consists of a 23km north–south Linea A, that connects El Centro to El Poblado, and a 6km east–west Linea B. Trains run at ground level except for 5km through the central area where they use elevated tracks.
The metro company also operates four cable-car lines, called Metrocable, built to service the impoverished barrios in the surrounding hills and Parque Arví in Santa Elena, with two more under construction at the time of research. The rides themselves afford magnificent views and make for a lovely way to check out the town. The three main Metrocable lines are included in the price of a metro ticket, while the Arví line is separate.
If you're going to spend a while in Medellín it may be worth getting a 'Civica' card, purchased at metro ticket booths, for discounted tickets and faster access.
Taxis are plentiful in Medellín and all are equipped with meters. The minimum charge is COP$5500. A taxi from the center to El Poblado will cost around COP$10,000 to COP$12,000. Alternatively, use ride-share apps such as Uber, Tappsi or Easy Taxi.