SHASTA VALLEY HOLES:
Enigmatic circular holes are found in rocks around the world.
- Holes vary in diameter, but 1 inch (2.54cm), 2 inch (5.08 cm) and 2.75 inch (7 cm) are common diameters.
- There are no rotational drilling groves on the walls of the holes.
Photos of holes from Connecticut are courtesy of Tim MacSweeney and Dave Cuneo.