Like the town’s general store from 1919 and schoolhouse from 1850, the Oakhurst Diner in Millerton, N.Y., is a living time capsule.

Housed in the original 1950s Silk City dining car, it screams classic diner: crimped stainless-steel facade, Formica counter with stools, pink-and-blue neon sign, specials scrawled on chalkboards. But the nods to midcentury nostalgia mostly end there.

Sure, you can get two eggs and a cup of Joe here. But you could also order a banh mi sandwich, Bulletproof coffee, CBD-infused Kombucha, artisanal hot sauce, a macrobiotic bowl with seaweed and brown rice, kimchi and a $16 burger made from “grass-fed and grass-finished” beef sourced from Herondale Farm, about 14 miles up the road.