The Faroe Islands, the remote Danish archipelago positioned in the Atlantic about halfway between Iceland and Scotland, has seen tourism double over the past five years. Getting to or navigating the islands hasn’t always been easy, but visitors have flocked nonetheless to their windswept craggy coasts, multicolored cottages and colonies of puffins. Now, the Eysturoy tunnel—a landmark addition to the underwater highway complex connecting the archipelago—links the cosmopolitan capital of Torshavn with the second most populous island. This marvel of engineering contains the world’s first undersea roundabout, with an illuminated, sea blue central pillar decorated by Faroese artist Trondur Patursson. More inbound air-travel options are on the horizon with the resumption of flights to and from Edinburgh. —Brad Japhe