The Thomas Stone National Historic Site, also known as Haberdeventure or the Thomas Stone House, is a United States National Historic Site located about 25 miles (40 km) south of Washington D.C. in Charles County, Maryland.

The site was established to protect the home and property of Founding Father Thomas Stone, one of the 56 signers of the United States Declaration of Independence.

Stone's original plan was to build a small, modest home for him, his wife Margaret, and their two daughters but before the house was completed, his father died and five of his younger brothers and sisters came to live with him at Haberdeventure creating the need for larger living quarters.

[1][3] The property was privately owned until 1977 when a fire severely damaged the central section of the house.

Today, a visitor center located at the site has exhibits on the Declaration of Independence and the life of Thomas Stone.