The High Speed Train Under the Sea

The Eurostar allows you to travel between London and mainland Europe by crossing the English Channel underwater. The tunnel is the longest undersea rail system in the world.

This massive engineering feat connects the United Kingdom to France and beyond via a 31-mile passage beneath the seabed. Before it opened, the only way to cross the channel was by ferry or air. Now, travelers can speed through this subterranean marvel in just minutes. It remains a vital artery that effectively bridges island nations to the European continent.