Jersey City is New Jersey's second-largest city. It is located in Northeast New Jersey between the Hudson and Passaic rivers.
From the West take the New Jersey Turnpike to exit 14B or 14C, or take the Pulaski Skyway (Route 1/9) and get off between Tonnelle Ave (for Journal Square and the Heights) or just before the Holland Tunnel for Hamilton Park and downtown. From Manhattan take the first left after exiting the Holland Tunnel, or the Kennedy Blvd exit when coming out of the Lincoln Tunnel.
The PATH (Port Authority Trans-Hudson) train runs to Journal Square, Grove Street, Exchange Place, and Pavonia/Newport in Jersey City with connections to Newark, lower Manhattan, midtown Manhattan, and Hoboken. It costs $1.50 each way and is easily the best way to get into town. Travel Time between Downtown Jersey City (Grove Street) and Lower Manhattan (World Trade Center Station) is approximately 6 minutes.
By light rail
The Hudson-Bergen light rail, operated by NJ Transit connects the Jersey City waterfront to Hoboken and Bayonne. Eventually it is planned to extend northward into the suburbs of Bergen County.
NJ Transit and other operators run buses to the Journal Square bus terminal. For destinations not served by this terminal, check out Newark Bus Terminal and Port Authority Bus Terminal in Manhattan.
The best way to navigate within Jersey City, as a tourist, is likely by PATH, Taxi, or Light Rail. Most of the major sections of town are serviced by these forms of transport. The bus system is simply too arcane for the short term visitor to come to terms with.
Downtown Jersey City (DOJO)