HARTLAND, Vt.

Each spring and summer, a Vermont bog yields a rare spectacle — hundreds of wild orchids in bloom, drawing visitors from around the country.

The bulbous pink and white showy lady’s slippers (Cypripedium reginae) are on full display among the ferns, bushes and chirping birds at Eshqua Bog in Hartland.

This particular orchid, considered rare in Vermont and a number of other states and different from the more common pink lady’s slipper, thrives in Eshqua, because of the wet, sunny conditions, with soils containing peat and lime.

Mary English drove about an hour from Landgrove, Vermont, to see the orchids. When she arrived, she had the bog to herself.

“I just wandered through by myself. It was very special. It’s like being in a South American country,” she said.

A boardwalk allows visitors of all ages and abilities access to the bog and an up-close look at the plants.

“Gosh, aren’t they beautiful?” said Heather Crawley, of Maryville, Tennessee, as she studiously photographed the orchids with a special lens. “To think it’s natural, too.”

Visitors can also walk a half-mile trail.

The area is technically a fen because it’s less acidic than a bog and fed by groundwater containing nutrients like calcium and magnesium from the area bedrock, according to the Nature Conservancy, which owns and manages the preserve along with the New England Wild Flower Society. The sanctuary includes an 8-acre wetland and 33 surrounding acres.

Other orchids also bloom, like yellow lady’s slipper in late May and early June and the white bog orchid.

The lime-rich groundwater also helps to yield pitcher plants, insectivorous sundew and other plants.

But the orchids are typically the main show for visitors.

“The orchids love it at Eshqua, and people love to see the orchids,” said Rose Paul, of the Nature Conservancy.