Imagine finding a lost treasure worth millions: where would you start?

If you were asked about your most priceless possession, what’s the first thing that pops into mind? And what would you do to protect it? Since time immemorial, pirates and princes, captains and mysterious men have acquired wealth and done the impossible to defend it. So much so that from treasure chests to gold-filled trains, some riches were hidden so well that they have vanished to this day. Let’s find out about 10 of the most unbelievable lost treasures around the world and try to imagine what we’d do if we found them.

The Amber Room, often called "The Eighth Wonder of the World", was an 18th-century opulent chamber made of six amber panels, gold leaf, and mirrors. It was commissioned in 1701 for Prussia’s King Frederick, and later gifted to Russia’s Tsar Peter the Great in 1716.

It was then installed in the Catherine Palace in Tsarskoye Selo, Russia, until it was dismantled by German troops in just 36 hours in 1941 and moved to Königsberg Castle in East Prussia. Since 1945, amid Allied bombings, the Amber Room has disappeared without a trace, believed to have either been burned, buried, or sunk in the Baltic Sea.

It’s an armored 150-meter-long convoy rumored to be filled with 300 tons of gold, jewels, and stolen art. Allegedly, it vanished in May 1945 inside a secret network of unfinished tunnels in the Owl Mountains, near Walbrzych, Poland, as German forces fled the advancing Soviet Army.

Explorers and treasure hunters have launched many high-profile searches using groundbreaking technology to locate the train, but nothing has ever been found.

The Flor de la Mar ("Flower of the Sea") is a legendary Portuguese ship that sank in November of 1511, on its return from conquering a wealthy hub, now known as Malaysia. With it, an immense fortune estimated at $2.6 billion sank to the bottom of the ocean and was never recovered, making it one of the richest shipwrecks in history.

Over the centuries, countless marine salvage companies have attempted to recover the treasure, although political disputes over salvage rights between Indonesia, Malaysia, and Portugal have continuously interrupted such expeditions.

The Treasure of Lima is a massive fortune of gold, silver, and jewels (including a life-size solid gold statue of the Virgin Mary), valued at up to $208 million and missing since 1820.

It was stolen by British Captain William Thompson, who had originally been tasked with protecting the Spanish treasures and allegedly buried them on Cocos Island off Costa Rica, never to be seen again. When captured, he agreed to lead the Spanish forces to the gold, but instead escaped with his first mate into the thick jungle and vanished forever.

The infamous pirate Edward Teach, also known as Blackbeard, left behind a treasure no one has ever found. He terrorized the Atlantic Coast and the Caribbean, capturing numerous ships and stealing gold, silver, and valuable goods from them.

Modern estimates suggest that his riches would be worth $150 million. Before his death in November 1718, he claimed his wealth was hidden where "nobody knows but me and the Devil."

The Oak Island Money Pit is a centuries-old mystery of buried treasure filled with traps and tunnels, located in Nova Scotia, Canada. It began in 1796 when teenager Daniel McGinnis found a circular depression under a tree and started digging with friends.

As they dug, they began to find oak logs 10 feet down, pointing to a man-made shaft, but water from a storm later flooded the pit. Rumors suggest there is a vault with pirate gold from Captain Kidd, Spanish artifacts, or Marie Antoinette's jewels, as searchers have found tropical coconut fibers and fragments of gold chain there; skeptics suggest it might’ve just been a natural sinkhole all along.

Of the 50 Imperial Fabergé Easter eggs created for the Russian royal family, up to eight remain unaccounted for. Notable missing pieces include the "Nécessaire Egg" (1889), the "Cherub with Chariot" (1888), and the "Hen with Sapphire Pendant" (1886).

While many were lost or stolen during the 1917 Russian Revolution, miraculous findings, such as the "Third Imperial Egg" recovered at a U.S. flea market after a century-long disappearance, keep collectors' hopes alive.

The Honjō Masamune Sword is a priceless Japanese samurai weapon that was lost after World War II. It is considered one of the finest blades ever forged by the master swordsmith Gorō Nyūdō Masamune, and remains a priceless cultural symbol of power.

Designated an official Japanese National Treasure in 1939, many experts remain hopeful it might appear in a private collection or attic.

The Beale Ciphers Treasure is a renowned unrecovered fortune of gold, silver, and jewels, with an estimated value of over $65 million.

In 1820, a mysterious man named Thomas J. Beale checked into a hotel in Lynchburg, Virginia, and left a locked iron box with an innkeeper, alongside three encoded messages. If cracked, they supposedly reveal the hidden fortune. For now, only one has been decoded. Some experts allege the entire mystery is a hoax, while others continue to try to decipher the codes to this day.

The Lost Dutchman’s Gold Mine is a famous, undiscovered gold deposit, said to be hidden somewhere near Apache Junction, in Arizona’s Superstition Mountains.

Legend claims it was found by Jacob Waltz, a German immigrant (misidentified as Dutch due to the old use of the term "Deutsch"), who settled in Arizona in the 19th century and supposedly kept its location secret before dying in 1891, except for the verbal hints he allegedly gave to his neighbor Julia Thomas, sparking modern treasure hunting to this day.

Secret uses

There’s a hidden microphone in your phone, and here’s where it is

You’ve probably twisted a bread bag closed, filled up your car, or pulled a sheet of aluminum foil from the box thousands of times without giving it a second thought. But many of the everyday objects we’ve used for decades have clever features that most people never notice. From the tiny pocket on blue jeans to the little arrow next to your gas gauge, these hidden designs have practical stories behind them, and once you know them, you’ll never look at these familiar items the same way again.

If you own an iPhone, you’ve probably noticed the tiny black dot next to the rear camera. It’s small, so people tend to assume it’s another camera sensor or even part of the phone’s design. The small hole found near the camera bump on every iPhone is actually a rear microphone.

It captures clearer audio when you’re recording videos and helps reduce background noise during FaceTime and regular phone calls. If you own an iPhone Pro model from the iPhone 12 Pro onward, you'll also see a larger dark circle. That’s the LiDAR scanner, which sends out invisible infrared light to create a 3D map of your surroundings. It helps the camera focus faster in low light, powers Apple’s Measure app, and makes augmented reality features much more accurate.

Whether it's a holiday dinner, an anniversary, or simply a nice meal with friends, you’ve probably held a wine bottle and noticed the deep indentation in the bottom. Many people tend to think the deeper the indent, the fancier the bottle.

That indentation is called a punt, and it’s been a part of the bottle-making for centuries. Originally, it helped strengthen hand-blown glass bottles, making them less likely to crack under pressure. Today, it still adds structural stability, particularly for sparkling wines, while also giving servers a comfortable place to rest their thumb when pouring, though some say it helps collect the sediment as wines age. In any case, a deeper pun doesn’t automatically mean a better or more expensive bottle.

Almost every driver has experienced that awkward moment at the gas station. You pull up to the pump, step out of the car, and suddenly realize the fuel door is on the opposite side.

To help prevent exactly that situation, many modern vehicles include a small arrow next to the gas pump symbol on the dashboard’s fuel gauge. The arrow points towards the side of the vehicle where the fuel filler door is located. It’s a small detail on the dashboard, yet once you notice it, you’ll never have to circle the pump again.

All elevators look pretty much the same. Bigger or smaller, they all look similar, a gray box with a mirror and buttons. But if you pay close attention, you may notice there’s a small round opening near the top of the door.

That opening is a keyhole used by trained maintenance technicians and emergency responders. With a special elevator key, they can manually unlock the landing doors when repairs are needed or if passengers become trapped inside. The system allows professionals to reach the elevator safely without damaging the doors or relying solely on electrical controls. Hopefully, most of us will never need to see it in action. But in an emergency, that tiny opening becomes one of the most important parts of the system.

If you’ve ever stood in the bread aisle comparing loaves, you’ve probably noticed the colorful plastic clips or twist ties holding the bags shut. Contrary to what many think, they’re not simply a part of the packaging.

For many bakeries and grocery stores, the colors indicate the day a loaf was delivered or baked. While the exact color schedule can vary between bakeries and regions, employees use the system to quickly spot older inventory and rotate fresher bread to the back of the shelf. That way, customers are more likely to pick up the freshest loaf available.

Whether you wear jeans every day or only pull them out for yard work, you’ve probably noticed the tiny extra pocket tucked inside one of the front pockets. It’s too small for a phone and not very useful for loose change, but there’s a reason for it.

Back in the 1800s, when Levi Strauss & Co. created rugged denim pants for miners, ranchers, and cowboys working across the American West, pocket watches were commonplace. Workers needed a safe place to carry their watches while riding horses, so that little pocket was designed specifically to protect the watch from damage. Pocket watches disappeared, but the tiny pocket became such an iconic part of blue jeans that manufacturers have continued including it for well over a century.

Almost everyone has had the same frustrating experience. You pull on a sheet of aluminum foil, and suddenly the entire roll slides out of the box and lands on the kitchen counter.

That’s exactly why major manufacturers such as Reynolds introduced the small side tabs, known as end locks, in the mid-1990s. By pressing the tabs inward, they hold the cardboard roll in place like built-in axles. This keeps the roll from sliding out of the box, makes it much more stable as you pull, and helps the serrated edge cut a cleaner, straighter sheet. It also reduces waste by preventing the foil from bunching up or tearing unevenly. It’s a simple design, yet useful as it can get.

Every household has pens lying around for all kinds of purposes. And most of them have a common feature, a hole in the cap, which isn’t simply part of the design.

BIC and other pen manufacturers included the opening as a safety feature. If someone, especially a child, accidentally swallows a pen cap, the hole can allow a small amount of air to pass through, reducing the risk of complete airway blockage while emergency help is on the way. The design became part of border efforts to improve consumer product safety after choking incidents drew attention to the danger of small plastic objects.

If you grew up sewing or watching somebody do it, you probably remember the classic tomato-shaped pincushion sitting beside the sewing basket. Hanging from it was a tiny red strawberry that looked like nothing more than a cute finishing touch.

In reality, that little strawberry has its own job. Instead of soft stuffing, it’s filled with emery, a gritty material made from crushed abrasive minerals. Running pins and needles through it helps polish away tiny spots of rust, smooth rough edges, and keep the points sharp enough to glide through fabric more easily.

Think back to the first time you learned to type. Maybe it was at work, or on a family computer. Wherever it was, someone probably told you to keep your fingers on the "home row." That’s exactly why the F and J keys have tiny raised ridges.

The bumps let your index fingers find the correct starting position by touch alone, allowing you to type without constantly looking down at the keyboard. The technique, known as "touch typing," is widely credited to American court stenographer Frank Edward McGurrin, who demonstrated it in 1888. As typewriters became more common, manufacturers experimented with different ways to help typists orient their hands, and by the mid-20th century, companies such as IBM standardized the subtly raised plastic bars that remain on nearly every keyboard today.