艺廊这件作品还在版权期内本站只列资料、不放图，可以到下面的链接看原图。
Jefferson Pier
- 国家
- 美国
Jefferson Pier, Jefferson Stone, or the Jefferson Pier Stone, (PIE-er) is a stone in Washington, D.C. that marks the second prime meridian of the United States even though it was never officially recognized, either by presidential proclamation or by a resolution or act of Congress. It is located 391 ft (119 m) WNW of the center of the Washington Monument.
摘自英文维基百科「Jefferson Pier」（CC BY-SA 4.0），暂时没有中文条目。