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

Celebrating Cornbread

Visit the "Other Pittsburgh" - just in time for the annual Cornbread Festival in south Tennessee.

Racing Through Life Together

This longtime racing couple went from Grand Prix volunteers to the ones behind the wheel.

Home Spun

Stramba Alpaca Farm and Fiber Mill processes its own farm-grown alpaca fiber to create products.