Ever driven under the ocean? These 11 undersea tunnels are wild feats of engineering—think Victorian Londoners battling floods, Japan’s bullet trains zipping beneath the sea, and Norway’s roads plunging deeper than skyscrapers are tall. There’s even a tunnel with its own island rest stop! Each one proves humans just don’t take ‘impossible’ for an answer. Which one would you dare to visit first? #TravelGoals #EngineeringMarvels #BucketList #Transportation