The great room has not been part of the rental, but guests are typically offered a tour of it – and the rest of the castle.

[1] From the flat roof, the panoramic view extends from Boston Light on the south, to the Magnolia shore on the north, overlooking Marblehead Neck and the entire harbor.

[1] The castle was completed June 1927 by Marblehead artist Waldo Ballard (né Waldo Peter Ballard; 1873–1958)[5] and his wife, Joan Ballard (née Joanna McCoy; 1873–1958), who stated that they based their design on Erik the Red's castle at Brattahlíð in Greenland, although the structure is Gothic in nature and does not resemble buildings of the type that would have been constructed at Brattahlíð during the era of Erik the Red.

It is said that Ballard painted an oriental rug design on the castle's great room floor, based on an actual carpet in the nearby Jeremiah Lee Mansion.

According to her biography by the Mystic Seaport Museum, L. Francis Herreshoff had designated Vaughn as executrix and sole beneficiary of his estate.

Michael Horton Rubino, EdD, JD, and his wife, Christina (née Pranker), acquired the Herreshoff Castle in 1990.