The modern world is full of gigantic megaprojects that many people have never even heard of. In this episode, we take a look at some of the biggest construction projects both completed and ones that are still being built.

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Check out the new Smart Travel Podcast.

This week's show is supported by the new Smart Travel Podcast. Travel smarter — and spend less — with help from NerdWallet. Check out Smart Travel at the Link below:

Smart Travel Podcast