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Norway wants to build the world's first underwater floating tunnel for £19 billion

Norway wants to build the world's first underwater floating tunnel for £19 billion

The floating underwater tunnel would consist of two 4,000-foot-long, curved concrete tubes, submerged 66 feet below the surface of the Norwegian Sea.

Norway wants to build the world's first underwater floating tunnel for £19 billion

No floating underwater tunnel like this has ever been built before.

No floating underwater tunnel like this has ever been built before.

For motorists underwater, the experience would be similar to being in any other tunnel.

For motorists underwater, the experience would be similar to being in any other tunnel.

The tunnels would enter the bedrock beneath the fjord on each side.

The tunnels would enter the bedrock beneath the fjord on each side.

The submerged tubes would be steadied by being attached to pontoons on the surface of the sea.

The submerged tubes would be steadied by being attached to pontoons on the surface of the sea.

There would be wide gaps between the pontoons to allow ferries to pass through.

There would be wide gaps between the pontoons to allow ferries to pass through.

Another option suggested by the NPRA is to combine an underwater tunnel with a bridge.

Another option suggested by the NPRA is to combine an underwater tunnel with a bridge.

This solution is reminiscent of the Øresund which connects the Danish capital of Copenhagen to the Swedish capital of Malmö.

This solution is reminiscent of the Øresund which connects the Danish capital of Copenhagen to the Swedish capital of Malmö.

The NPRA is also considering creating a 12,139-foot-long suspension bridge, which would be three times the length of San Francisco's Golden Gate bridge and double the current world record for a bridge's length.

The NPRA is also considering creating a 12,139-foot-long suspension bridge, which would be three times the length of San Francisco

The towers on each end of this world record-breaking suspension bridge would stand at 1,476 feet tall — 492 feet higher than the Eiffel Tower.

The towers on each end of this world record-breaking suspension bridge would stand at 1,476 feet tall — 492 feet higher than the Eiffel Tower.

The first proposed crossing is for Sognefjord which links up Oppedal with Lavik. By 2035, the crossings are set to be installed between many of the country's fjords, according to Wired.

The first proposed crossing is for Sognefjord which links up Oppedal with Lavik. By 2035, the crossings are set to be installed between many of the country

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