Welcome to Unknown World

The Crypt of Civilization
Under the foundation of Phoebe Hearst Memorial Hall at Oglethorpe University in Georgia, the United States, is a large room, that was sealed shut with a welded stainless steel door more than seventy five years ago.
Sarajevo Tunnel
Five meters below the runway of Sarajevo's airport runs a short stretch of tunnel that was dug out during the Siege of Sarajevo to bring supplies to the cut-off city. For four years this 800-meter long tunnel was the besieged city’s only connection to the outside world, and its life support.
Leaning Tower of Pisa
The Leaning Tower of Pisa is the campanile, or freestanding bell tower, of the cathedral of the Italian city of Pisa, known worldwide for its unintended tilt to one side.
The Forgotten Giants
Danish artist Thomas Dambo has been building stuff using trash and recycled materials since an early age, starting with smaller sculptures such as birdhouses and furniture to bigger pieces such as the six “Forgotten Giants” he recently installed around Copenhagen.
Pripyat
A vast stretch of snow-covered bleakness, this Ukrainian city has been deserted since the nuclear accident of April 1986.
Angkor Thom
Angkor Thom, located in present day Cambodia, was the last and most enduring capital city of the Khmer empire.
El Helicoide: The Shopping Centre That Became A Prison
The spiral structure in Venezuela was conceived in the 1950s as a monument to a nation’s confidence – but now its crumbling shell houses a notorious political prison.
RAF Barnham
In the early l950s, RAF Barnham was selected for development as a dedicated storage and maintenance facility for nuclear weapons, in particular for Blue Danube, Britain's first nuclear bomb.
Meteora
The Metéora is one of the largest and most important complexes of Greek Orthodox monasteries in Greece, second only to Mount Athos.
Colosseum
The Colosseum or Coliseum, also known as the Flavian Amphitheatre is an elliptical amphitheatre in the centre of the city of Rome, Italy.
Butrint
Inhabited since prehistoric times, Butrint has been the site of a Greek colony, a Roman city and a bishopric.
Robben Island
Robben Island is an island in Table Bay, 6.9 km west of the coast of Bloubergstrand, Cape Town, South Africa.
The Forbidden City
The Forbidden City was the Chinese imperial palace from the Ming Dynasty to the end of the Qing Dynasty. It is located in the centre of Beijing, China, and now houses the Palace Museum. For almost 500 years, it served as the home of emperors and their households, as well as the ceremonial and political [...]
Project Riese
Riese is the code name for a construction project of Nazi Germany in 1943–1945, consisting of seven underground structures located in the Owl Mountains and Ksiaz Castle.
Bayantal Abandoned Soviet Airbase
Built in the 1970s, this air base in Mongolia had a 2-mile-long runway and was seen as a frontline for any possible conflict with China.
London Post Office Railway
The Post Office Railway, known as Mail Rail since 1987, is a driverless underground railway that was built to move mail between sorting offices.
Thilafushi
The stunning tropical islands of Maldives, southwest of India, is known for its sandy beaches and turquoise waters. But very few are aware of its dirty side.
Trolltunga
Trolltunga is a piece of rock hanging horizontally out of a mountain about 700 meters above the Ringedalsvatnet in Skjeggedal close to Tyssedal by the Sørfjorden of the Hardanger Fjord in the municipality of Odda, Norway.
Hashima Island
Hashima Island is one among 505 uninhabited islands in Nagasaki Prefecture about 15 kilometers (9 miles) from Nagasaki itself.
Cueva de las Manos
Cueva de las Manos is a cave or a series of caves located in the province of Santa Cruz, Argentina, famous (and gets its name) for the paintings of hands.
Sachsenhausen Concentration Camp
Sachsenhausen was a Nazi concentration camp in Oranienburg, Germany, used primarily for political prisoners from 1936 to the end of the Third Reich in May 1945.
Excelsior Tunnel
In 1959 it was the centre of project Military Atomic Energy Authority operation orpheus investigating the possibility of masking the seismic signal given out by underground nuclear tests.
Volubilis
Volubilis is a partly excavated Roman city in Morocco situated near Meknes between Fes and Rabat.
Aogashima Volcano
Aogashima is a volcanic Japanese island in the Philippine Sea.
Stalag Luft III
Stalag Luft III was a Luftwaffe-run prisoner-of-war camp during World War II that housed captured air force servicemen. It was in the German province of Lower Silesia near the town of Sagan (now Żagań in Poland), 100 miles (160 km) southeast of Berlin. The site was selected because it would be difficult to escape by tunneling.
Minaret of Jam
The Minaret of Jam is a UNESCO World Heritage Site in western Afghanistan.
Derweze Crater
The Derweze Crater, also known as the Door to Hell, is a natural gas field in Derweze (also spelled Darvaze, meaning "gate"), Ahal Province, Turkmenistan. The Door to Hell is noted for its natural gas fire which has been burning continuously since it was lit by Soviet petrochemical scientists in 1971.
Río de la Plata
On the southeast coast of South America, between Uruguay and Argentina, there is a tapering intrusion of the Atlantic Ocean. The funnel-shaped intrusion extends about 290 kilometer inland and terminates at the point where the Uruguay and the Paraná rivers meet. This is Río de la Plata, or the “River of Silver” in Spanish.
Derinkuyu Underground City
Derinkuyu Underground City is an ancient multi-level underground city of the Median Empire in the Derinkuyu district in Nevşehir Province, Turkey.
The Buddhas of Bamiyan
On the cliff face of a sandstone mountain, visible from the ancient Silk Road near the town of Bamiyan in Afghanistan, are two massive voids left by two monumental statues of Buddha that once stood there.
Mù Cang Chải
Mù Cang Chải is a rural district of Yên Bái Province, in the Northeast region of Vietnam. As of 2003, the district had a population of 42,574. The district covers an area of 1,199 km². The district capital lies at Mù Cang Chải.
Vozrozhdeniya Island
In 1948, a top-secret biological weapons laboratory, nicknamed Aralsk-7, was established here. Until its closure in the 1990s, the laboratory tested some of the deadliest pathogens known to man, including plague, anthrax, smallpox, brucellosis, tularemia, botulinum and Venezuelan equine encephalitis.
Monument to The Armenian Alphabet
Located near the village of Artashavan, close to the highway, in Armenia, stands 39 giant carved Armenian letters dedicated to the language its speakers take pride in.
Kasbah Telouet
The Kasbah of the Glaouis is not old, yet it is one of the most important sights of yesterday's Morocco.
Mauthausen Concentration Camp
Mauthausen-Gusen concentration camp grew to become a large group of Nazi concentration camps that was built around the villages of Mauthausen and Gusen in Upper Austria.
Metro-2
Metro-2 in Moscow, Russia, is the informal name for a purported secret underground metro system which parallels the public Moscow Metro. The system was supposedly built, or at least started, during the time of Joseph Stalin and was codenamed D-6 by the KGB.
Catacombs Of Kom Es-Shoqafa
The Catacombs of Kom el Shoqafa (meaning “Mound of Shards”) is a historical archaeological site located in Alexandria, Egypt and is considered one of the Seven Wonders of the Middle Ages. The necropolis consists of a series of Alexandrian tombs, statues and archaeological objects of the Pharaonic funeral cult with Hellenistic and early Imperial Roman [...]
Mount Weather Emergency Operations Center
The Mount Weather Emergency Operations Center is a civilian command facility in the U.S. state of Virginia, used as the center of operations for the Federal Emergency Management Agency (FEMA). Also known as the High Point Special Facility (HPSF), its preferred designation since 1991 is "SF".
Humberstone and Santa Laura Saltpeter Works
Humberstone and Santa Laura Saltpeter Works are two former saltpeter refineries located in northern Chile. They were declared a UNESCO World Heritage Site in 2005.
Stonehenge
One of the most famous sites in the world, Stonehenge is the remains of a ring of standing stones set within earthworks. It is in the middle of the most dense complex of Neolithic and Bronze Age monuments in England, including several hundred burial mounds.
Pamukkale
Pamukkale, meaning "cotton castle" in Turkish, is a natural site in Denizli Province in southwestern Turkey. The city contains hot springs and travertines, terraces of carbonate minerals left by the flowing water.
The Petra Monastery
Ad Deir is a monumental building carved out of rock in the ancient Jordanian city of Petra.
Timgad
Timgad (called Thamugas or Tamugadi in old Berber) was a Roman colonial town in the Aurès Mountains of Algeria, founded by the Emperor Trajan around AD 100.
Iguazu Falls
Iguazu Falls are waterfalls of the Iguazu River on the border of the Argentine province of Misiones and the Brazilian state of Paraná.
Horseshoe Bend
Horseshoe Bend is the name for a horseshoe-shaped meander of the Colorado River located near the town of Page, Arizona, in the United States.
Grand Canyon
The Grand Canyon (Hopi: Ongtupqa; Yavapai: Wi:kaʼi:la) is a steep-sided canyon carved by the Colorado River in the United States in the state of Arizona. It is contained within and managed by Grand Canyon National Park, the Hualapai Tribal Nation, and the Havasupai Tribe. President Theodore Roosevelt was a major proponent of preservation of the [...]
Atacama Desert
The Atacama Desert (Spanish: Desierto de Atacama) is a plateau in South America, covering a 1,000-kilometre (600 mi) strip of land on the Pacific coast, west of the Andes mountains. It is the driest non-polar desert in the world. According to estimates the Atacama Desert proper occupies 105,000 square kilometres (41,000 sq mi), but its [...]
Mrauk U
Spread across the beautiful rolling hills of Rakhine in Western Burma, lies a little known archeological site—the medieval town of Mrauk U.

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