40°49′33″N 73°32′11″W / 40.82576°N 73.53633°W
 | This article needs additional citations for verification. (July 2010) |
The Knollwood estate was a Gold Coast era castle-esque house and estate. Located in Muttontown, New York, U.S., its ruins are now part of the Muttontown Preserve.
| Knollwood Estate | |
|---|---|
 The gateway to the estate in the modern day | |
| Location | Muttontown Preserve |
| Built | 1906-1920 |
| Built for | Charles Hudson |
| Demolished | 1959 |