The Channel Tunnel – Longest Underwater Tunnel in the World It connects 🏴England and 🇫🇷France under the English Channel. The tunnel stretches 50.5 km with 37 km underwater, making it the longest underwater section of any tunnel in the world. It takes around 35 minutes to travel from England to France through the tunnel. The tunnel is considered one of the “Seven Wonders of the Modern World” by the American Society of Civil Engineers.
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