Every October, a stretch of shoreline on Lake Keowee fills with costumed children, decorated car trunks, and — after dark — a movie screen glowing against the water. The Trunk-or-Treat & Outdoor Movie Night at Duke Energy's World of Energy in Seneca has become one of Oconee County's more unusual fall traditions, partly because of what surrounds it: one of the largest nuclear power plants in the United States.
The free event, set for Friday, October 16, 2026, from 6 to 9 p.m., is hosted by Oconee Nuclear Station at the World of Energy education center, 7812 Rochester Highway. Families can expect face painting, pumpkin painting, games, and the trunk-or-treat rounds themselves, followed by a movie screened outdoors on the center's peninsula. Organizers ask guests to bring lawn chairs and blankets, with the film starting at 7:30 p.m.
What makes the setting distinctive is the venue's history. The World of Energy opened in July 1969, while Oconee Nuclear Station was still under construction, and has since welcomed more than three million visitors through its doors. Its exhibits walk guests through the "Story of Energy," explaining how electricity is generated from water, coal, uranium, and renewables, and offering a look at how the adjacent plant operates. Outside, there is a butterfly garden, a nature trail, and a picnic shelter overlooking the lake.
The plant next door began commercial operation in 1973 and is one of the nation's largest nuclear plants, with three generating units. Over its first half-century it generated more than 500 million megawatt-hours of electricity — a figure Duke Energy marked when the station celebrated its 50th anniversary in 2023 with, fittingly, a free outdoor movie night at the World of Energy.
That anniversary celebration points to a broader pattern: the education center has long functioned as a community gathering place, not just a visitor attraction. It hosts free events throughout the year, including outdoor movie nights, National Hunting and Fishing Day, and the Festival of Trees. The trunk-or-treat and movie night fits that mission — a chance for neighbors to use the grounds along the lake for something other than a field trip.
For families in Seneca and the surrounding Upstate, the appeal is straightforward. Trunk-or-treating has grown in popularity as a safer, more contained alternative to door-to-door Halloween wandering, and pairing it with an outdoor film turns a quick candy run into an evening out. The lakefront setting, with the nuclear station's cooling infrastructure visible in the distance, gives the night a backdrop few other trunk-or-treats can match.
The event is sponsored by the station and the education center, so admission and activities are free. Guests who want to extend the visit can arrive early to walk the nature trail or take in the exhibits before the candy and the movie begin.
For a region where the nuclear station has been a fixture for more than five decades, the fall gathering is a small, cheerful reminder that the same campus built to explain how power is made also knows how to throw a neighborhood party.