Married couple Cody and Kourtni Price from New Mexico, USA, are currently working together on their second fixer upper home after purchasing it with the purpose of turning it into their forever home.

Having named the house the 'old lady', Cody and Kourtni have been documenting their renovation process on Instagram, including sharing the hurdles of how it had turned into a bigger project than they'd first imagined.

"We extended the house, replaced failing trusses, and basically had to start over," Kourtni told Newsweek, explaining that they'd opted to do most of the work themselves during evenings and weekends.

While older homes often include features and surpises that modern homes typically lacks, such as hidden rooms or laundry chutes, the couple couldn't have predicted what they found hidden in the walls of their house.

On 9 June, the couple shared a video of them working to remove one of the walls inside the home when they found relics from World War II hiding inside.

As they worked to remove the wood from the wall, they were shocked to find ammo cans from World War II hiding inside.

They explained in the caption of the video: "The original brick home was likely built in the ‘40s or ‘50s. But around the 1970s, someone added on… using what they had: leftover military materials from a nearby surplus depot."

"Back then, it wasn’t just clever — it was necessary. Materials were hard to find or afford, so people got resourceful and used what was available," they said.

They went on to explain that they've since learned that several other houses in their surrounding area had been built using the same military materials that had been left over from the wars.

"People could buy truckloads of these crates for cheap and use them for sheds, add-ons, even whole houses!" they explained.

Explaining what the next step is for their house renovation, they wrote: "We’re now rebuilding this space with care — preserving the story, but creating a home that’s warm, modern, and ours."

However, Kourtni told Newsweek that they weren't planning on keeping the crates in the walls, 'as cool as they are', due to having found some had started to rot or had gotten compromised.

"We still have a lot of the crates, and we'll find a way to incorporate a few of them into our boys' room or decor—they're part of the story now," they said.

People quickly took to the comment section of the video, as one person wrote: "Recycling at its best."

"Some walls in my childhood home were built with Sikorsky aircraft crates!" another person shared.

Others also suggested ways the family coupld incorperate the crates in their home, as one person suggested: "I would have left an entire wall of them if it would still be safe because that’s sick and amazing talking point."

"Ours is framed in tank transport boxing," a second person said, while a thid wrote: "You should check with the war museums before getting rid of those boxes. I know from my dad that some of those are valuable."