It is one of the greatest mysteries of the Isle of Avalon that two different healing springs, one touched red with iron, the other white with calcite, should rise within a few feet of each other from the caverns beneath Glastonbury Tor.
The stones of Puma Punku shouldn even exist. They are so precisely cut that even a razor blade cant fit through the interlocking joints. The Inca believed this ancient temple had been built by the gods who created the world
Costa Rican Stone Spheres - One of the strangest mysteries in archaeology was discovered in the Diquis Delta of Costa Rica. Since the hundreds of stone balls have been documented, ranging in size from a few centimetres to over two meters in diameter.
Loretto Chapel Staircase, Santa Fe, NM A masterpiece—and mystery—of woodworking, this spiral structure is entirely self-supporting, without any central column to provide stability and with wooden pegs instead of nails.
Ancient megalithic sites of Ireland. Thought to be the world's oldest sundial carved on a stone outside the tomb of Knowth, Co. The two holes in the center of the image probably held the gnomon (object used to cast the shadow).