Formerly a private residence completed in 1889, Castle Marne is now a favorite spot for Denver weddings and afternoon tea.
From Castle Marne/Facebook
Norumbega Inn, Maine —
The Norumbega Inn in Camden, Maine, was built in 1886 as a private residence. Now the "stone castle by the sea" is a bed-and-breakfast featuring dinner cooked by a former Culinary Institute of America instructor.
Courtesy Christian Giannelli
Thornewood Castle, Washington —
Although Thornewood Castle stands guard in Washington state, it's actually a 500-year-old English Elizabethan manor that was moved to the United States as a gift from Chester Thorne for his bride, Anna.
Courtesy Thornewood Castle
The Biltmore, North Carolina —
Completed in 1895 for George Vanderbilt, the Biltmore was designed by architect Richard Morris Hunt. Guests can't stay in the main house but there's an inn built in 2001 and a historic cottage for rent.
Courtesy The Biltmore Company
The Chanler at Cliff Walk, Rhode Island —
The Chanler at Cliff Walk was finished in 1873, the summertime retreat for New York Rep. John Winthrop Chanler and his wife, Margaret Astor Ward.
Courtesy The Chanler at Cliff Walk
Keswick Hall, Virginia —
The Villa Crawford estate was completed in 1912 and served as a private residence for 35 years. English businessman Sir Bernard Ashley, widower of designer Laura Ashley, bought the manor in 1990 and converted itinto an elegant hotel.
Courtesy Keswick Hall
Castle Hotel & Spa, New York —
Once the Westchester, New York, home of Gen. Howard Carroll, a noted businessman and one-time Washington correspondent of The New York Times, the Castle Hotel & Spa now offers fine dining and a THANN Sanctuary Spa.
Courtesy Castle Hotel and Spa
Castle Hill Resort and Spa, Vermont —
Castle Hill was the first home in the state to be fully wired for electricity and to boast its own elevator, and it still boasts many original lighting fixtures and woodwork.