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It beggars belief that people would actually stash away these supercars and forget all about them.

Every gearhead wishes they'll own a supercar at some point in their lives. Sadly, most gearheads never get to own the supercars they love, largely because they're typically rare and expensive. When given a chance to own a supercar, most people would take excellent care of it — they'd keep it in a climate-controlled garage where harsh weather conditions, reckless friends, and other harmful elements can't access.

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However, not all people take good care of their supercars, even when they cost millions. In fact, some people forget about their supercars completely, leaving them rotting away in garages, sheds, or even out in the open. Let's explore ten of the best supercar barn finds of all time.

The 250 GTO is Ferrari's pride and joy. This fantastic car is widely considered to be Ferrari's greatest car for various reasons — it won multiple racing championships for the brand, it's extremely rare, and is the most expensive car in history.

As such, everyone was stunned when a 250 GTO, chassis number 3589, was found rotting on a trailer in Ohio. The car had been raced extensively until 1964 when it was donated to a Texas high school. The 250 GTO was later transported to Ohio, where it remained for decades.

In most cases, supercar barn finds are solitary vehicles. Not this time. In 2018, a French auctioneer was left with a puzzled face when he found 81 classic cars stored in a barn and surrounding fields on a farm. The cars belonged to a compulsive French buyer and had barely been used.

Of all the cars, the Lamborghini Miura P400 was the most desirable, despite being covered by rust and muck. It later sold for a €560,000 after restoration.

Tom Cotter is a famous automotive journalist and Youtuber best-known for his series Barn Find Hunter. In the series, Cotter goes around the US looking for old, forgotten rides in barns. In 2016, Cotter had one of his best episodes ever when he found a 1967 Shelby Cobra 427 in a barn sitting alongside yet another rare classic — we'll tell you which one later.

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The Cobra is considered to be one of the greatest American sports cars, which is why it sold for over $1 million at a Gooding & Company auction despite its unrestored state.

A few years ago, auto enthusiast Michael Potiker was taking a walk in his neighborhood when something caught his eye. A neighbor's garage door was open, and inside, Potiker could see what looked like an old Mercedes-Benz under a cover. ​​​​​​​

Intrigued, Potiker approached and asked for more details about the car. He learned that the car was a Mercedes-Benz 190SL that belonged to a man in palliative care, and soon found a way to buy it. Potiker has since transformed the car into a beautiful Barchetta cruiser. ​​​​​​​

In the late '60s, Ferrari wanted to compete in the fabled 24 Hours of Daytona competition, so it built five special aluminum-bodied 365GTB/4 Daytonas. One of the five Daytonas was fully road-legal, and it was eventually bought by a Japanese guy, who shipped it to Japan and stashed it away in a garage for four decades. ​​​​​​​

The Daytona resurfaced in 2017, and to gearheads' surprise, it was in superb condition. It had matching numbers and just 22,000 miles on the odometer. ​​​​​​​

The Jaguar E-Type needs no introduction, as it's one of the most beautiful cars ever built. The E-Type is the type of car you'd expect every owner to maintain in great condition so that they can flaunt it now and then. However, not all E-Types got love and care from their owners. In fact, one was left rotting in a barn in the UK for over four decades. ​​​​​​​

The E-Type, a 1964 model with a six-cylinder engine under the hood, had so many issues that it almost looked unfixable. Thankfully, the pros at E-Type UK brought it back to life. ​​​​​​​

The BMW M1 caused a huge wave of excitement when it debuted in the late '70s. Considered to be BMW's first supercar, the M1 instantly stole gearheads' hearts with its gorgeous wedge-shaped design penned by Giorgetto Giugiaro and fantastic performance. ​​​​​​​

RELATED: These Are The 10 Coolest Wedge-Shaped Sports Cars

One of the rare BMW M1s was discovered in an Italian garage where it had been collecting dust for more than three decades. The car had only been driven for a few months and, with just over 4,500 miles on the odometer, it was a huge hit among collectors.

Remember when we told you about the fantastic Shelby Cobra 427 that Tom Cotter found in a barn, sitting alongside another mysterious supercar? Well, this Ferrari 275 GTB is that mysterious supercar.

The 275 GTB was a 1966 model and was one of only 80 long-nose aluminum-bodied examples built that year. Like the Cobra, the 275 GTB was in fairly good shape and even had matching numbers and original components. It later sold for a whopping $2.5 million at an auction. ​​​​​​​

In the '50s, Mercedes-Benz stunned the automotive world when it built what's considered to be the first-ever supercar - the 300SL Gullwing. This car had everything — an awe-inspiring design featuring gullwing doors, unbeatable performance, and Mercedes-Benz's advanced engineering. ​​​​​​​

A half-century after the 300SL's introduction, one of the rare examples was found rotting under a banana tree in Cuba. Sadly, the car was in terrible condition as it didn't have an engine and other key components. ​​​​​​​

Tom Cotter has found many valuable classics when filming his show. However, few come close to the value of the Ferrari 250 GT Ellena he found in 2018, as it's one of the rarest Ferraris. The car was originally imported in the '70s from Switzerland and was stored in an American garage. ​​​​​​​

Thankfully, the 250 GT Ellena was still in great condition as it had been driven scarcely and still had all original components intact.

Martin is a seasoned content creator who has been writing about cars for over a decade, and has been in love with them for even longer. Growing up, Martin was surrounded by gearheads who instilled a deep love and understanding for cars in him at a young age. He loves to learn and write about all the developments happening in the auto industry - especially in the EV space. When he's not writing about cars, he likes to spend quality time with his wife, kids, and fur baby.