Carved entirely into solid limestone bedrock around 3300 BC on the island of Malta, a massive three-tiered underground sanctuary stands as one of the oldest and most mysterious structural marvels in human history. Discovered accidentally by construction workers in 1902, the Hal Saflieni Hypogeum is a sprawling underground labyrinth containing a complex network of halls, … Read more
Plunging nearly 1,000 feet beneath the Chihuahuan Desert in Chihuahua, Mexico, lies one of the most physically hostile and visually stunning environmental discoveries on the planet. Discovered accidentally by mining brothers in the year 2000, the Cave of Crystals at Naica is an underground chamber housing the largest single crystalline formations ever discovered on Earth. … Read more
Deep beneath the jagged, volcanic landscape of Cappadocia, Turkey, lies a staggering feat of ancient subterranean structural architecture. Discovered accidentally by a homeowner in 1963, Derinkuyu is not a basic network of primitive caves; it is a fully engineered, multi-tiered underground metropolis plunging over 280 feet into the earth. Capable of securely sheltering up to … Read more