The Panama Canal Zone, also simply known as the Canal Zone, was a concession of the United States located in the Isthmus of Panama that existed from 1903 to 1979. It consisted of the Panama Canal and an area generally extending five miles (8 km) on each side of the centerline, but excluding Panama City and Colón. Its capital was Balboa.
US fleet off the coast of Panama, March 1, 1923
The Canal Zone Courthouse was the site of the Canal Zone District Court which existed from 1914 until 1982.
Gorgas Hospital was built by the French as L'Hospital Notre Dame de Canal in 1882, renamed Ancon Hospital when the U.S. assumed control in 1904, rebuilt in 1915 and finally renamed in honor of William C. Gorgas in 1928. It is now home to Panama's Ministry of Health and the Instituto Oncologico Nacional.
Howard Air Force Base in 1970
An international zone is any area not fully subject to the border control policies of the state in which it is located. There are several types of international zones ranging from special economic zones and sterile zones at ports of entry exempt from customs rules to concessions over which administration is ceded to one or more foreign states. International zones may also maintain distinct visa policies from the rest of the surrounding state.
The Vietnamese Demilitarised Zone separating North and South Vietnam in 1969
Flags of United Nations member states flying outside the United Nations Headquarters complex in New York City.
Nanjing Road in Shanghai, within the Shanghai International Settlement, a concession administered by multiple foreign powers during the late Qing Dynasty.
Duty Free Shop in the sterile zone of Pyongyang Sunan International Airport
