(NPR) - President Trump has never been shy about promoting his businesses.

Even at a press conference after the racially tinged violence in Charlottesville, Va., he paused for a product placement:

"Charlottesville is a great place that's been very badly hurt over the last couple of days. I own, I own actually one of the largest wineries in the United States. It's in Charlottesville."

It's not one of the largest, although Trump's 2017 financial disclosure statement put its value between $11 million and $52 million. But its bottles were on the racks of a gift shop at Shenandoah National Park, about midway between Charlottesville and Washington, D.C.

Some visitors saw the wine there last summer. They told one of their colleagues at the Center for Biological Diversity in D.C. The colleague is Bill Snape, a lawyer at the center.

"They had been at Shenandoah National Park, and seen a lot of Trump wine," Snape told NPR. He drove down to see for himself, also to do some camping and birding.