Enigmatic tubular holes are found in rocks around the world.
- Holes vary in diameter, but 2.75 inch (70mm) and 3.0 inches (7.62mm) seem to be common diameters.
- Holes may go through the rock or may terminate in the rock.
- Hole walls are vitrified, textured with a rare protrusion.
- Holes are commonly found in ancient stone lines and `
Photos of holes from Connecticut are courtesy of Tim MacSweeney and Dave Cuneo.