It's an incredible natural phenomenon that happens in just a few places in the world. For one week in the summer, synchronous fireflies put on a breathtaking show in Pennsylvania's Allegheny National Forest. WQED photojournalist Dave Forstate follows a group of still photographers setting up in the darkness to capture tens-of-thousands of lightning bugs as they flash in harmony.

More WQED Digital-First Features

American Cheese

The American Cheese Society is now getting more people in this country to share their love of cheese

WQED "The Sweater" Sessions: Elias Khouri

Theme Music

WQED "The Sweater" Sessions: Michael Moricz

Theme Music