The park was built next to Mount Fuji near Aokigahara - Japan’s famous ‘suicide forest’ - and close to the former headquarters of Aum Shinrikyo, the religious cult responsible for 13 deaths in the Tokyo sarin nerve gas attack of 1995.

Six Flags New Orleans (SFNO) is a 140-acre, abandoned theme park in New Orleans that has been closed since Hurricane Katrina struck the state in August 2005.

The Mir mine, also called the Mirny mine, is an open pit diamond mine located in Mirny, Sakha Republic, in the Siberian region of eastern Russia. The mine is >525 meters (1,722 ft) deep (4th in the world) and has a diameter of 1,200 m (3,900 ft), and is one of the largest excavated holes in the world.

The Borovsko Bridge is an unfinished highway bridge near Borovsko , part of Bernartice municipality, Central Bohemian Region, Czech Republic. It is commonly known as the "Czech Avignon" or "Hitler's Bridge".

Situated in the west of Bosnia on the border with Croatia, Objekat 505, as it was officially known, was the largest underground airport in the Balkans. The primary purpose of the Objekat 505 was to house a long-range radar early warning system, akin to NORAD, as well as to provide a strategic command center for the country’s defense.

The Superconducting Super Collider (SSC) (also nicknamed the Desertron) was a particle accelerator complex under construction in the vicinity of Waxahachie, Texas.

Juragua Nuclear Power Plant was a nuclear power plant under construction in Cuba when a suspension of construction was announced in 1992 following the collapse of the Soviet Union and the termination of Soviet economic aid to Cuba.

The Barbados HARP Gun, was part of Project HARP, short for High Altitude Research Project, which was a joint project of the United States Department of Defense and Canada's Department of National Defence created with the goal of studying ballistics of re-entry vehicles at low cost; whereas most such projects used expensive and failure-prone rockets, HARP used a non-rocket spacelaunch method based on a very large gun to fire the models to high altitudes and speeds.

Prora, also known as the Colossus of Prora, is an enormous building complex on the island of Rügen, Germany, that was built by Nazi Germany between 1936 and 1939 as a beach resort of the Strength Through Joy (Kraft durch Freude or KdF) project.

Presidio Modelo (Model Prison) was a former “model prison” of Panopticon design, located on the Isla de la Juventud in Cuba, built between 1926 and 1931, during the repressive regime of Gerardo Machado.

The Vajont Dam (or Vaiont Dam) is a disused dam in Italy, which was completed in 1959. On 9 October 1963, during initial filling, a massive landslide caused a man-made megatsunami in the lake in which 50 million cubic metres of water overtopped the dam in a wave 250 metres (820 ft) high, leading to 1,910 deaths and the complete destruction of several villages and towns.

Erta Ale (or Ertale or Irta'ale) is a continuously active basaltic shield volcano in the Afar Region of northeastern Ethiopia. It is situated in the Afar Depression, a badland desert area. Erta Ale is the most active volcano in Ethiopia.

The complex contains over five hundred nuclear-hardened concrete military bunkers, partially buried underground and protected by thick berms of earth, to resist a surface blast wave, as well as radioactive fallout.

A bridge which connects Hong Kong with Macau and Zhuhai, is the world’s longest sea crossing.

ATLAS-I is world’s largest wood and glue structure designed to test the radiation hardening of strategic aircraft systems against EMP pulses from nuclear warfare.

The Space Power Facility (SPF) is the world’s largest vacuum chamber measuring 30 meters tall and 37 meters across.

Germany’s “treasure chamber” is located in a disused mine near Freiburg. Documents from over a thousand years of history are stored in the underground archive.

Bagger 288 (Excavator 288), built by the German company Krupp for the energy and mining firm Rheinbraun, is a bucket-wheel excavator or mobile strip mining machine.

The Stelling van Amsterdam was the most advanced military structure of its type in the world - 135 km (84 miles) of forts, batteries and moats completely encircling the city in a defensive barrier.

Antarctic Basecamp, 1911 Tinned ham and whisky are stacked on the shelves beside jars of olives and anchovy paste, awaiting the return of the man who put them there. However, he never would step back into this cosy living space and enjoy the food he had left behind. His name was Robert Falcon Scott – […]

Al-Khazneh is one of the most elaborate temples in the ancient Arab Nabatean Kingdom city of Petra. As with most of the other buildings in this ancient town, including the Monastery (Arabic: Ad Deir), this structure was carved out of a sandstone rock face. The structure is believed to have been the mausoleum of the […]

Carrie Furnace is a former blast furnace located along the Monongahela River in the Pittsburgh area industrial town of Swissvale, Pennsylvania.

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.

The norias of the ancient Syrian city of Hama are seventeen historic waterwheels located along the Orontes River that date back to the Byzantine Era.

SS Richard Montgomery was an American Liberty ship built during World War II, one of the 2,710 used to carry cargo during the war.

Some 3,000 driving dams once existed throughout New Zealand, with the last built during the late 1930s. As the timber industry dwindled, gradually the dams decayed and disappeared and now only a few remain as relics of this destructive industry.

The Outer Trial Bank is a circular artificial island in the Wash, East Anglia, England. It is one of two islands constructed during the 1970s for a governmental water resources scheme.

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.

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.

Kupari was once a hugely popular holiday resort, until it was damaged during the Croatian War of Independence.