* Duncan House (1 Usonian Dr., Acme, Pa.) is open for one-hour tours on Sundays, noon to 6 p.m. Reservations requested. Admission: $16. Children older than 6 admitted with adult.
The house sleeps six, and there's a two-night minimum stay -- and you need to plan in advance. Weekends are booked through November. Rates: $385 per night for up to three people, $425 starting May 1. The adjacent Balter and Blum houses offer four bedrooms; the Blum House, opening April 10, allows one-room, one-night stays. Grocery shopping and chef services are available by prior arrangement.
Info: 877-833-STAY (7829); http:/