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Things often creep people out when they look completely normal but seem to have ulterior motives.
Take this house as a prime example: with windowless rooms, no bedrooms and warehouse-style units - what was it ever used for? Or what will it be used for in the future? Whatever the answer is for the latter - it better be worth it because the property is on the market for $1 million (£715,000).
The property - which was listed on Zillow back in May - has large glass windows from the outside but when potential buyers go to take a look at the inside, they will soon realise there are no windows to be seen meaning that they're just there for show.
If all that wasn't weird enough, the house also features a glass security window like the ones you may have seen in police stations.
According to the MailOnline, there is also two electrical grids that connect the property and a natural gas generator powered by two diesel fuel tanks in the event of a natural gas failure.
The house is marketed as the 'perfect storage spot for large wine collections, art collections, multiple cars, as well as serving as the ultimate safe house'.
If you're wondering whether it's plonked in the middle of nowhere, the answer is no. It's situated on the corner of a tree-lined street looking inconspicuous.
Since the listing was highlighted on social media, people have started to share their thoughts over its use.
One person wrote: "Tell me you're breaking the law, without telling me you're breaking the law."
Another added: "That's where they brought Jason Bourne during his flashbacks."
While someone else claimed to know exactly what the house was used for when they commented: "I live near that house. It was owned by our electric utility, now called Oncor."
They went on to add: "They built several of them and designed them to look like regular houses but they still stuck out like a sore thumb because they were three times bigger than the other houses in the neighbourhood."
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