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

Horse Haven

WQED visits this sanctuary in Ohioville, PA - where humans care for horses during their final days.

One Simple Gift

Here’s the story of a box containing one simple gift..that’s just right for the man who receives it.

American Cheese

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