These engineering marvels literally reach new heights After centuries of stone arches, viaducts, covered crossings, and concrete-and-steel masterpieces, it may seem like every potential bridge has been built.
But increasing traffic and urbanization, as well as new engineering advances, have given bridge-builders new and more impressive gulfs to traverse. Since the beginning of the new century, a number of record-breaking structures have opened, traversing some of the most difficult waterways, valleys, and gorges in the world.
Here are just some of these amazing feats of design, which manage to look effortless while achieving engineering excellence.

Jon Bowen: Flickr/Creative Commons

Millau Viaduct (Millau, France: 8,070 feet long) An award-winning project designed by Foster + Partners, this svelte, cable-stayed crossing boasts numerous superlatives: It?s the highest structure in France, has the highest road bridge in Europe, and spans 8,070 feet across two high plateaus overlooking the River Tarn.
Practically, it has offered a quicker route from Paris to Barcelona since opening in 2001. Aesthetically, it?s a work of art, as well as an engineering marvel.

Duncan Hull: Flickr/Creative Commons

Rio-Antirrio Bridge (Gulf of Corinth, Greece: 9,450 feet long)
Officially called the Charilaos Trikoupis Bridge, after the 19th-century Greek leader who initially proposed the crossing, this connection between the mainland and Pelopon...