Every year for two weeks between mid-May and mid-June, Congaree National Park in South Carolina is home to a fairy-tale-like display of flashing lights. These rhythmic performances happen all because ...

Other firefly lotteries have already closed, so this may be your last chance until next spring.

It happens every year, but it's still an illuminating sight to behold. Fireflies in the woods of Great Smoky Mountains National Park put on their annual synchronous light show. This week is the peak ...