The Thomas Griswold House is a historic house on Boston Street in Guilford, CT. It was added to the National Register of Historic Places in 1975. The Guilford Keeping Society operates the house as the Thomas Griswold House Museum. The museum includes the late 18th century period New England saltbox house, a historic blacksmith shop, a barn with farm tools and implements, two corn cribs and a Victorian era three seat privy. The museum is open seasonally from June through October.
The Medad Stone Tavern is a Dutch gambrel style fourteen room, ten fireplace tavern built in 1803 by Medad Stone. It was added to the National Register of Historic Places in 2010. The property includes ten acres, a barn, a corncrib and a garage. The Len Hubbard Community Garden is located on the property. The Tavern never opened as a tavern, however, it has been restored to it's tavern roots and welcomes many visitors at the Guilford Keeping Society's Memorial Day Picnic and September Wine Tasting.