The Maginot Line, named after French Minister of Defense André Maginot, was a line of concrete fortifications, tank obstacles, artillery casemates, machine gun posts, and other defenses, which France constructed along its borders with Germany and Italy, in the light of experience from World War I, and in the run-up to World War II.
Metro-2 in Moscow, Russia is a purported secret underground metro system which parallels the public Moscow Metro. The system was built supposedly during (or from) the time of Stalin and codenamed D-6 by the KGB. The length of Metro-2 is rumored to exceed even that of the "civil" (i.e. public) Metro. It is said to connect the Kremlin with the FSB headquarters, the government airport at Vnukovo-2, and an underground town at Ramenki, in addition to other locations of national importance.
Leptis Magna was a prominent city of the Roman Empire. Its ruins are located in Al Khums, Libya, 130 km east of Tripoli.
Bagan is home to the largest and densest concentration of Buddhist temples, pagodas, stupas and ruins in the world with many dating from the 11th and 12th centuries.
Giethoorn is called the Venice of the Netherlands for about 7.5 km of canals run through the little village. Some 50 little wooden bridges span the canals. It was founded around 1230 when fugitives coming from the Mediterranian regions settled there.
Kartoffelrækkerne is a residential area in Copenhagen. The houses are some of the most sought after properties in Denmark.
Kowloon Walled City was a tiny Chinese enclave that was located in the middle of British Hong Kong for decades. Originally a military fort, it became a very dense urban settlement, until it was torn down in 1993.