Designer: George K.S. Rotne
The award-winning engineering miracle that is Øresundsbroen could not but occupy the very top of this list. Designed by architect George K.S. Rotne and completed on the turn of the millennium, the bridge connects Denmark’s capital to the Swedish town of Malmö via both motorway and railway that run across Oresund strait. What makes the structure truly remarkable, however, is that it begins as a tunnel in Copenhagen, which, approximately 8km (5 miles) off the Danish coast, reaches a small artificial island where it transitions into a bridge, continuing all the way to Sweden. The journey between the neighboring countries takes about 40 minutes.