Most visitors to Baltimore will head for the compact Inner Harbour and downtown areas, which are easy to navigate on foot or by public transport. Water taxis act like a bus service and are a cheap and convenient way to get around the Inner Harbour, connecting many attractions as well as other districts.The inexpensive bus network connects all parts of the city and provides an easy way of getting around, although transfers are often necessary. The metro and light rail systems provide limited coverage, mainly aimed at commuters. Taxis are usually ordered by phone, but they can be found at taxi ranks or hailed on the street.Driving in central Baltimore is unnecessary and not recommended due to difficult and expensive parking, but the layout is fairly easy and congestion limited to rush hour. The recommended option for visitors is the Charm City Circulator, which provides a free daily bus service to Baltimore's most popular areas.