In major cities like Brooklyn and London, there are fake townhouses that hide subterranean chimney vents, emergency subway exits, and more. Camouflaged in plain sight, they normally go unnoticed within their architectural surroundings.
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A teen in Michigan built a working nuclear reactor. He taught himself how to build it as a weekend hobby project in his basement from ages 15-17 for $3500.
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The world's longest traffic jam took place in Beijing, China. It was over 60 miles long and lasted 11 days.
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There's a road in Lancaster, CA that has grooves carved in such a way that when you drive over them at 55 MPH, they will play a part of Rossini's "The William Tell Overture."
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