The Nagasaki Port is a natural harbor that is surrounded by mountains on three sides. It opened in 1571, and developed through trading with foreign countries since the olden times. Thus, the impact of foreign trade is very evident in the streets, in their food culture as well as their events. Cruise ships entering the Nagasaki Port pass by under the Venus-Wing Bridge and head to the terminal in the center of the city. The pier houses Japan's largest CIQ (Customs, Immigration and Quarantine) facility and the terminal provides free Wi-Fi connection. Two of Japan's World Heritage Site candidates can be accessed within a walking distance from the pier, and some of the city's major tourist areas can be accessed through the streetcars. Moreover, bus tours are available with itineraries including Huis Ten Bosch, Onsen, and Shimabara Castle. Other than these destinations. Bus tours may also include ceramic-making in their itinerary. Nagasaki has been certified as one of the "The World's Top Three Night Views" along with Hong Kong and Monaco in 2012.