A tunnel is typically an underground passageway, built in an effort to address the growing needs of roads, highways and bridges to handle a large volume of traffic. The exact definition of a tunnel has been twitched many times in the past. Irrespective of that, tunnels are the results accomplished by a magnificent feat of engineering, with boring giant holes in mountains, or laying several feet of pathway under the ocean. Let us have a look at the world’s strangest tunnels- Channel Tunnel link Channel Tunnel: Located in Coquelles, France, this tunnel is commonly known as the Chunnel. This 31 mile tunnel that links England and France was built in 1994 with a staggering cost of more than $20 billion. The idea of linking England and France through the English Channel was being toyed at for several years. However, the project could not take shape owing to a variety of reasons, technical and political included. The invention of modern boring machines coupled with the irrefutab...