
While archaeologists are constantly uncovering things covered by the earth, we often find interesting artifacts and relics from underground mines. And if you want to dive through history by checking out the strange objects found underground, then keep reading. These findings have often baffled historians, whether they’re still unknown to us or unexplainable.
5. Wolfsegg Iron

Also known as the Salzburg Cube, this Out of Place Object is a small cube of worked iteon that was discovered at Austria’s Braun iron foundry. The cube was found when workmen broke open a block of lignite. The lump of metal was covered in a thin layer of rust. At first, it was thought to have a meteoric origin, but it has now been assumed to be a chunk of cast iron that was often used as a ballast that was dumped.
4. Klerksdorp Spheres

These small, reddish-brown discs have been the source of many conspiracy theories. They have a metallic sheen and, when cut open, exhibit a radial structure. But despite their distinctive appearance and defined shape and symmetrical ridges, these spheres might be baffling, but they are actually creations formed by the precipitation of volcanic sediment. They were first discovered by miners working the pyrophyllite mines of Ottosdal in South Africa, and since then, they have been verified as dinosaur eggs, alien artifacts, a new metal, and more, until they finally narrowed down the true source.
3. Pepita Canaã

Known as the world’s largest gold nugget, this lump of mineral was discovered by miner Julio de Deus Filho in Brazil’s Naked Mountain gold region in 1983 as part of the Serra Pelada 1980s gold rush. It’s just over 60kg in weight, as heavy as a man, and contains 52kg of gold.
2. Tomb of Khuwy

You can’t talk about strange objects found underground without bringing up the archaeologists’ discovery of the tomb of a high official in South Saqqara who lived about 4,400 years ago. His name was Khuwy, and the hieroglyphs on the wall were something that baffled historians. The colours were incredibly well preserved, despite the cracks and chips on the walls and ceilings.
1. Cochno Slab

Archeologists in Glasgow excavated a 5,000-year-old stone slab in 2016, but it wasn’t the first time it was uncovered. One of the strange objects underground that baffles historians is the Cochno Slab, which was first excavated in 1887 but was covered in graffiti, so it was buried. Another group did the same in 2016. The slab has been known to the locals since the 19th century. The flat stone features swirling decorations that have been found at many other prehistoric sites worldwide.