The most spectacular bridges in the world

Nine Elms Bridge by Bystrup, in progress (London, UK)

Nine Elms Bridge by Bystrup, in progress (London, UK) - Danish firm Bystrup won the commission to build a bridge in South London's Pimlico neighborhood. However, the pedestrians-only curving structure is not without controversy. Critics worry the new bridge, which is not yet under construction, will destroy Pimlco Gardens, one of few public gardens in the area. 

Sarajevo Bridge by BCQ Arquitectura Barcelona, in progress ( Barcelona, Spain)

Sarajevo Bridge by BCQ Arquitectura Barcelona, in progress ( Barcelona, Spain) - BCQ Arquitectura Barcelona's plant covered bridge takes Heatherwick's green concept one step further. Their proposed upgrades to the existing Sarajevo Bridge include photo-luminescent stones to light the pathway without electricity and concrete that converts pollution into harmless substances. As of now, there is no set completion date.

Charles Kuonen Suspension Bridge (Switzerland)

Charles Kuonen Suspension Bridge (Switzerland) - Measuring 1621 feet long, the newly opened Charles Kuonen Suspension Bridge is the world's pedestrian suspension bridge, according to Zermatt Tourism.

Zhangjiajlie Grand Canyon Glass Bridge by Haim Dotan Architects

Zhangjiajlie Grand Canyon Glass Bridge by Haim Dotan Architects - The glass-bottom bridge stretches across  two hills and is 300 meters above ground.

Helix Bridge by Cox Architecture, 2010 (Marina Bay , Singapore)

Helix Bridge by Cox Architecture, 2010 (Marina Bay , Singapore)  - When it opened in 2010, Singapore's Helix Bridge was the first to incorporate the sape of a double-helix. The structure is meant to symbolize life, renewal and growth, and siths near Moshe Safdie's $5.7 billion Marina Bay Sands casino.

Køge North Station by COBE, in progress ( Køge, Denmark)

Køge North Station by COBE, in progress ( Køge, Denmark) - There's more than meets the eye with this structure. The bridge, designed collaboratively by COBE Architects Sissing + Weitling and COWI, includes passageways for both trains and cars as well as a full station and park-and-ride facilities. It's set to open in 2018.

Sölvesborg Bridge by Ljusarkitektur, 2013 (Sölvesborg, Sweden)

Sölvesborg Bridge by Ljusarkitektur, 2013 (Sölvesborg, Sweden) - In a rare twist, the Sölvesborg Bridge - Europe's longest pedestrian bridge at 2480 feet - was specially enhanced by a lightning design firm rater than an architect.  Ljusarkitektur mounted the structure with-color-change LED lights.

Lucky Knot Bridge by NEXT Architects, in progress (Changsta, China)

Lucky Knot Bridge by NEXT Architects, in progress (Changsta, China) - NEXT Architects' Lucky Knot Bridge is set to open later this year. The name and shape refer to the Chinese art of decorative knotting, which is associated with good luck.