The 6,988-square-foot interior is appealing to historic-home lovers for its many remaining period details. Highlights include custom millwork, built-in cabinetry, a tin ceiling, bay windows, and ...

After a nearly two-year renovation, led by her father as project manager, the historic buildings were upgraded while preserving the property’s architecture, opening as an inn in 2014.

6. 212 Madison St, Sag Harbor, NY Price: $2,195,000 Why it’s here: It’s all about location, location, location for this 1,122-square-foot historic home.

HBO's "The Gilded Age" films scenes in real historic mansions from the time period. Several mansions once owned by the Vanderbilt family in Newport, Rhode Island, appear in the show.