Area 51: Nevada's top-secret air base is heavily guarded and no one is allowed to enter or even fly over the area. The area is believed to be the site where the United States used to secretly develop and test new Air Force aircraft, and is also known for many believing it is linked to numerous UFO conspiracy theories.
Federal Reserve Bank of New York: About 25% of global gold is stored here. With so much money to protect, it's no wonder it's so cautious. The repository is 80 feet (about 24 meters) underground in the city, with 50 feet (about 15 meters) below sea level, and the surrounding buildings are guarded by trained chasers.
Fort Knox: The highly guarded Fort Knox is the gold depository of the U.S. Treasury. It not only stores thousands of tons of gold, but also important historical documents such as the Declaration of Independence and the Magna Carta during World War II. There are 7 power grid enclosures, heavily armed security guards, and a 24-ton security gate.
Tumen River: The boundary river between China and North Korea, and the lower reaches is the boundary river between North Korea and Russia. Within 1.6 kilometers, you can reach Russia from North Korea, through China. So many refugees who escaped from North Korea crossed the river in this section of the border and entered the Chinese border. Therefore, it is usually guarded by North Korean soldiers.
North Korea Demilitarized Zone: Commonly known as the "March 8th Line." The North Korean Demilitarized Zone is a narrow strip of land that borders North and South Korea. This demilitarized zone is also the border strip where the world's most military personnel are stationed. It is 257 km long and 4 km wide. Because the defensive wall around the border is so high, few people dare to cross it, and at the same time, it has become a nature reserve.
Principality of Sealand: A state established by an individual claiming to be established without international universal recognition. Located on a small island in the English Channel. The country has been occupied since its inception by its head, Peddie Roy Bates, his family, and his partners.
Green Rose Resort: This unique resort, 6,500 acres deep in the forests of West Virginia. However, its real secret is underground, where a 25-ton explosion-proof door is hidden underground. A new complex called the New Wing of West Virginia was also built as cover on the ground, and supplies and food were always available in the bunker.
Cheyenne Hill Military Base: The most heavily guarded cave military base in the world. Because Cheyenne Mountain is located deep in the North American continent, it is easy to hide, and there are hundreds of meters of granite here for cover, which is enough to withstand enemy nuclear attacks. In May 1958, the United States and Canada decided to jointly establish the North American Air Defense and Space Defense Command.
Mysterious Mormon Church: Mormon Church does not allow outsiders to enter, only to look outside. They are not only heavily guarded, but also infrared surveillance devices. Taking a picture of it can be a huge challenge. This is a photo of a newspaper clipping during construction in 1962.
Bold Lane Parking: Here you don't have to worry about car thieves stealing your car. This humble car park in derby, central England, is the safest place in the world. The car park uses a complex network, including CCTV system cameras, emergency buttons, multi-level entrances and barcoded tickets.