The Eysturoyartunnilin (Eysturoy Tunnel) connects Streymoy and Eysturoy, the two largest of the Faroe Islands. The tunnel, which opened to traffic at the end of 2020, is over 11 kilometers (6.8 miles) long and its deepest point is 189 meters (613.5 feet) below the seabed. The most interesting part of this eagerly anticipated project, though, is the colorful intersection at its center—the first undersea roundabout in the world. The roundabout links the capital city of Tórshavn to both sides of the Skálafjørður fjord. Not only is it extra-convenient (cutting down travel…
