Magnet hunting is becoming increasingly popular: it can make you rich in a day, but it can also cost you your life!

Magnetic treasure hunting has surged in popularity, offering enthusiasts the thrill of uncovering valuable items while posing risks to their health and safety. This unique hobby combines elements of fishing with metal detecting, using powerful neodymium magnets capable of lifting thousands of kilograms of iron-based objects from water bodies such as rivers, canals, lakes, and swamps. These magnets draw in ferromagnetic materials long buried beneath sediment, revealing everything from discarded bicycles and shopping carts to historical artifacts and even weapons. The phenomenon gained momentum during the pandemic, as people sought outdoor activities that maintained social distancing. Social media platforms quickly flooded with dramatic videos showcasing these finds, transforming magnetic treasure hunting into a globally recognized trend. Online forums like Reddit became hubs for discussion, drawing millions of views and hundreds of thousands of followers. The allure lies in the unpredictability, participants often discover mundane items like rusted tools and broken equipment, but occasionally stumble upon more remarkable treasures. Among the most frequent finds are everyday objects that have been discarded over decades, including bicycles, shopping carts, traffic signs, and fishing gear. For many enthusiasts, the ecological benefit is a major draw. “It feels good. You’re cleaning the water,” says Colt Busch, a dedicated hunter from Maine who has recovered over 140 bikes from local waterways. Each item removed potentially reduces hazards for wildlife and humans alike. However, the excitement extends beyond the ordinary. Some hunters encounter extraordinary discoveries, such as firearms and military ordnance. Skilled practitioners have developed protocols to ensure safety: they avoid touching suspicious items and immediately contact authorities. In 2026, Nate DeMontigny in Massachusetts retrieved a Derringer pistol still bearing police evidence tags. Similarly, in Britain, a Viking sword over a thousand years old was found in a river in 2024, while in New York, James Kane and Barbi Agostini made headlines after recovering a safe believed to contain $50,000 to $80,000 in cash. Yet, not all discoveries are benign. In Europe, particularly in the UK, France, and Germany, waterways conceal remnants of World War II. It is estimated that around ten percent of unexploded munitions from the war remain submerged, posing ongoing dangers. In the first half of 2025 alone, several incidents were recorded in the UK, including one involving a seven-year-old boy who pulled a grenade from a river. As a result, laws in countries like Germany and France have become increasingly strict, making magnetic treasure hunting illegal without special permits, which are nearly impossible to obtain. Legal status varies widely. In the United States, the activity is generally permitted, except in South Carolina, where it is banned due to concerns over underwater archaeological sites. However, local regulations can complicate matters, with national parks, military zones, and federally managed areas having their own rules. Federal laws, such as the Archaeological Resources Protection Act (ARPA), strictly prohibit removing artifacts older than a century from federal lands. In England and Wales, the Canal & River Trust manages most canals and does not allow this activity without prior approval. Scotland’s situation is even stricter, emphasizing the need for participants to research local laws before engaging. This highlights the importance of awareness and compliance with regional regulations to avoid legal repercussions. Despite its growing appeal, scientists caution against potential negative impacts. While removing large amounts of metallic waste can be beneficial, there are concerns regarding the removal of batteries containing heavy metals and sharp objects, which could harm ecosystems. Thus, while magnetic treasure hunting offers both adventure and environmental benefits, it requires careful consideration and responsible practice.