What Is the Longest Underwater Tunnel in the World?
Discover the Seikan Tunnel in Japan, the world's longest underwater tunnel connecting Honshu and Hokkaido beneath the Tsugaru Strait.
World Record Dive Depth: The Bathyscaphe Trieste's Historic Submarine Descent
Discover the remarkable dive depth record set by the Bathyscaphe Trieste in the Mariana Trench.