The Sly Barn was built around 1825 on the old Sly Farm on Route 94 which is now the Landmark Inn property. It is completely post and beam construction secured with wooden pegs.

Site of original barn near Landmark Inn.

The barn was disassembled from its original location and reconstructed piece by piece behind the Shingle House in 1956.

Today, the Sly Barn holds early American tools and farm implements, antique household appliances, and other historic materials. It is also the site of the lab for the Shingle Dig. Thousands of artifacts uncovered at the dig site are catalogued and some are displayed in the lab.