It is a National Historic Landmark located at 325 Pequot Avenue in New London, Connecticut.

James O'Neill came to New London, Connecticut in June 1884 and purchased two plots of land on Pequot Avenue for his wife Ella's 27th birthday.

It is now a two-story house, three bays wide with a porch that wraps around the front to the north side.

[2][4] The Eugene O'Neill Theater Center purchased it in 1976[5] and operates it as a historic house museum, furnished to appear as it might have for the setting of Long Day's Journey into Night.

The house also features exhibits about O'Neill's life and works, as well as artifacts and memorabilia, including the desk which he used to write his drama Anna Christie which won him the Pulitzer Prize.