HOW IT'S MADE: Underwater Tunnels In today's video we look at how Underwater Tunnels are made...Keep watching to see how they build these special tunnels! Subscribe for how it's made full episodes, documentaries, and short films of how every day items are actually made. Inspired by Discovery Channel, Discovery UK, Science Channel, Bright Side, How it's Made Official, and Huggbees. Also check out: HOW IT'S MADE: Earbuds On How It's Made we will go through recaps of How it's Made Episodes, How Stuff works, and How everyday items are actually made in factory. Stay tuned for the latest documentaries, short films, and how to make lasagna, crayons, watches, kimchi, swords, bourbon, laptops, wigs, food trucks, sandwich cookies, concrete, electric vehicle charging point, candy, meat, gold chain, balloons, ornaments, lipstick, marbles, hot dogs, office chairs, ping ponng tables, bubble gum, how wheels, fish food, bacon, doughnuts, aluminum cans, dry erase boards, ice cream, doritos, peanut butter, lollipops, chocolate coins, instantfilm, tofu, beer, slot machines, crab food, handcuffs, tortilla chips, pringles, golf clubs, sugar, false teeth, sundae cups, tissue, honey, candy canes, parachutes, grammy awards, money, exercise bike, back to the future, tequila, the Simpsons, Playstation 5, snow, aquarium, and Formula 1 cars