The 51,500 acre site is now a [[National Historic Landmark]], and visits can be made to the site only two days of the year: on the first Saturday in April and the first Saturday in October.<ref>[http://www.white-sands-new-mexico.com/military.htm Visiting the Trinity Site]</ref> | The 51,500 acre site is now a [[National Historic Landmark]], and visits can be made to the site only two days of the year: on the first Saturday in April and the first Saturday in October.<ref>[http://www.white-sands-new-mexico.com/military.htm Visiting the Trinity Site]</ref> |