Cities can feel like giant permanent things.

I tend to think of New York City in the Grand Canyon as two colossal American relics.

But in reality, New York was only created 358 years ago, whereas the Grand Canyon is closer

to 6 million years old.

New cities are springing up all the time, and the ones of the future will look nothing like

today's.

From artificial islands to underground metropolises, these are the most amazing cities of the future

in development right now.

You're listening. You're listening. You're listening to be amazed.

If you've ever walked the streets of an old city like London or Athens, you've probably enjoyed the vast amounts of history and culture on display.

And flipped out after Google Maps told you the fastest way to a museum was to walk through a canal.

Old cities are charming, but hundreds of years of evolving sprawl can be hard to navigate.

This is the exact problem Saudi Arabia hoped to address with their insane new future city.

The Line. Rather than a series of buildings of varying city, the line.

Rather than a series of buildings of varying heights, the line will essentially be two long buildings built in, well, a line,

right through the desert of the country's Tabuka province.

This mono building will be 105 miles long,

1,640 feet tall, and 656 feet wide.

For perspective, imagine if the Empire State Building was about as wide as two football fields

and was nearly twice as long as the Panama Canal.

The line will be the first development in the UAE's $500 billion Neon project.

A long-term plan for the country to build new cities and develop old ones.

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