Amazing photos: World's 15 strangest bridges

Some of the world's most remarkable infrastructure projects are bridges. Besides being vital transportation links, these bridges are architectural marvels...

Take a look at 15 strangest bridges across the world as listed by Popular Mechanics...

1. Rolling Bridge (United Kingdom)

The Rolling Bridge is a type of curling movable bridge completed in 2004 as part of the Grand Union Canal office and retail development project at Paddington Basin, London.

The Rolling Bridge was conceived by British designer Thomas Heatherwick, designed by SKM Anthony Hunt with Packman Lucas, and built by Littlehampton Welding.

It is twelve meters long and opens every Friday at noon. The Rolling Bridge lets boats pass by curling up until its two ends touch.

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The Neal Bridge

The Neal Bridge located in Pittsfield, Maine, completed in Novemeber 2008, is designed and built using structural composite materials and techniques.

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Henderson Waves

The Henderson Waves is Singapore's tallest pedestrian bridge connecting Mount Faber Park with Telok Blangah Hill Park. It stands tall at a height of 118-feet.

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Sundial Bridge

The Sundial Bridge is a cantilever spar cable-stayed bridge for bicycles and pedestrians.

Made with steel, glass and granite, the bridge designed by Spanish architect Santiago Calatrava is a cantilever cable-stayed bridge.

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Juscelino Kubitschek Bridge, Brazil

Completed in 2002, this asymmetrical bridge is built across the Lake Paranoa in Brasilia.

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Octavio Frias de Oliveira Bridge, Brazil

The Octavio Frias de Oliveira bridge is a cable-stayed bridge in Sao Paulo, Brazil over the Pinheiros River.

Opened in May 2008, the bridge is 453 ft tall. The bridge deck is unusual as it forms a 'X', crossing at the tower.

It is the only bridge in the world that has two curved tracks supported by a single concrete mast.

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Millau Viaduct, France

Opened in 2004, Norman Foster designed this huge cable-stayed bridge to carry travellers across the valley of the Tarn River in Millau, Southern France.

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Pont Gustave-Flaubert Bridge, France

This bridge crosses the Seine, a commercial waterway in France. With pylons at a height of 282 feet, the Pont Gustave-Flaubert is Europe's tallest lift bridge.

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Langkawi Sky Bridge, Malaysia

This curved pedestrian bridge is 2000-feet above sea level at the top of Mount Mat Cincang in Malaysia. A cable car takes tourists to the 400-feet long structure.

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Hangzhou Bay Bridge, China

The Hangzhou Bay Bridge, the longest sea-crossing bridge in the world opened in May 2008.

It is 36 kilometres long and reduces the distance between Shanghai and Ningbo by 120 km.

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Da Vinci Bridge, Norway

Da Vinci Bridge, designed by Norweigan artist Vebjorn Sand opened in 2001.

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Pythonbrug, The Netherlands

Design firm West 8 created a series of bridges linking Amsterdam's Sporenburg area with Borneo Island. Pythonbrug, which spans across a distance of 300 feet, opened in 2001.

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Gateshead Millennium Bridge, United Kingdom

This tilt-bridge designed by Wilkinson Eyre, a London-based architecture firm. It crosses the River Tyne, connecting Gateshead and New Castle.

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Oresund Bridge, Denmark and Sweden

The Oresund Bridge crosses the Oresund strait and joins Sweden with Denmark.

The bridge connects Sweden and Denmark, and it is the longest road and rail bridge in Europe stretching across a distance of length of 4.8 miles.

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Puente de la Mujer, Argentina

The Puente de la Mujer (Woman's Bridge) in Buenos Aires was designed by Santiago Calatrava.

It has a single mast with cables suspending a portion of the bridge which rotates 90 degrees in order to allow water traffic to pass.