Not the typical trench that you might hear about in war stories and history textbooks, but what can be one of the wonders of our planet. The Mariana Trench is recorded to be the deepest point on earth. How do you visit? Well with a highly protective submarine which is built to withstand pressures of up to 1090 bars. To put things into perspective, for every 33 feet a human body goes below sea level, an extra 15 pounds of force per square inch is exerted on the human body. The Mariana trench is 36, 070 feet which works to about 16, 395 pounds per square inch. That there is the equivalent of having 400 blue whales stack themselves on top of you. So, if you have any plans of visiting the world’s deepest point, make sure you get a submarine that can stand up to the weight of 400 whales.