Whether you're a car person or not, we all know the experience of seeing a unique-looking car and thinking, "my goodness..." Well, today, we're focusing in on those vehicles. In particular? The most monstrous-looking vehicles ever to roll across this big blue playground we call home. From NASA's largest vehicle ever to one of Caterpillar's biggest accomplishments, join us as we take a look at the 15 Most Monstrous Vehicles Ever Made!

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