World's Strangest Tunnel

The tunnel is an underground passage (usually), built in an effort to address the growing need for roads, highways and bridges to handle large volumes of traffic. The exact definition of the tunnel has been convulsed several times in the past. Apart from that, the tunnel is the result achieved by a remarkable engineering achievement, with a giant boring holes in the mountains, or put a few meters below the sea lane. Let's look at a strange tunnel in the world.

1. Channel tunnel

Channel Tunnel: Located in Coquelles, France, the tunnel is commonly known as the Channel. This tunnel has a length of 31 kilometers which connects Britain and France was built in 1994 with a staggering cost of more than $ 20 billion. The idea of ​​linking Britain and France via the English Channel worked for several years. But, the project can not be formed due to various reasons, technical and political included. The invention of modern machinery coupled with the undeniable benefits by linking the two countries finally possible. In order to provide protection from fire hazards, designers have built a smaller service tunnel between the main tube for extra escape Teo.

2. Smuggling tunnel

Smuggling tunnels are located in Tijuana, Mexico, has a length of 1000 meters. Long tunnel was discovered by U.S. and Mexican officials. This tunnel is used by devious criminals to smuggle druuuugs and never be heard in the past. Over the last few years, a large number of illegal tunnels have been discovered in the U.S., comes from Canada and Mexico. This tunnel has a length of 860 meters to the U.S.. The tunnel was fully equipped with lighting, ventilation systems, electricity and even elevators. The U.S. Drug Enforcement Agency issued a statement saying that the tunnel construction has been going on for over two years.

3. Infiltration Tunnel

Infiltration Tunnel: In the 1970s, three different tunnels discovered along one border of the two countries most at odds over the world. In 1990, a fourth tunnel was found slithering beneath the Korean demilitarized zone. The third invasion tunnels, also known as the Third Tunnel Aggression, scarcely more than 26 miles from Seoul, the capital of South Korea. Secret tunnel gives North Korea the military launched a major advantage of the massive South Korean his powerful enemies. The tunnel was big enough to shuttle all the military divisions per hour.

4. Chu Ci Tunnels

Chu Ci Tunnels located in Cu Chi, Vietnam, this giant labyrinth of tunnels played a vital role during the French Indochina War and the Vietnam War. This tunnel size ranges from 75 miles to more than 150 miles. Cu Chi Tunnels has become a popular tourist destination in recent years, allowed visitors to travel through a narrow room, check the deadly traps and even traveled to the underground command center from which the Tet attacks are planned.

5. Tokyo Bay Aqua-line

Tokyo Bay Aqua-line: the tunnel is located in the city of Kawasaki, Japan. This tunnel has a length of 6 miles by 3 miles long bridge dipped into it. Traffic was allowed to travel in 1997, allowing travelers between the cities of Kawasaki and Kisarazu City to travel about 45 minutes each day. The unique thing about the combination of bridge-and-tunnel is a major resting place is located on top of an artificial tunnel built at the entrance of this tunnel. The island is called Umi-Hotaru, which means "sea firefly", and serves as the resting place of shops and restaurants, along with the observation deck that looks out into the bay.