The Channel Tunnel is the longest undersea tunnel in the world.
✓ TRUE FACT
The Channel Tunnel is about 50 km long, with roughly 37–38 km running under the sea. It connects the UK and France and includes multiple bores for trains and service access.
🤯 "The Channel Tunnel is the longest undersea tunnel in the world — the UK and France connected by a giant metal straw under fish traffic."