Congratulations Cleojazzfloyd FTF!
The cache is located on the Nathaniel Thayer Estate. The mansion was built in 1846 by Nathaniel Thayer, then remodeled in 1902. Various members of the Thayer family have lived in the building, but it has been owned and operated by the SDA church since 1943. Thayer has been used as a home, a summer home, an administration building, a dormitory, a music department for Atlantic Union College, and for private music lessons. It is currently being used as a conservatory.
For the murderino's: this is episode 15 - Definitely Not Episode 16
SSDGM