Ley line

A ley line are streams of magic running all over the world, often connecting places with outstanding magic and supernatural energies.

Known ley lines
The Great Lakes region has lots of ley lines, which accounts for the heightened supernatural activity of the area.

Ley lines with heavy concentrations of dark energy run through both North and South Manitou Island in the north of Lake Michigan, and the secret islands in the lake's center. Another ley line runs directly beneath the Field Museum in Chicago.