#美国夏日户外活动# 探索美国的文化历史！国家公园管理局提供关于美国历史、建筑、考古、工程和文化方面数千个重要地点的信息。更多信息请见：https://www.nps.gov/history/heritage-travel.htm

#American Summer Outdoor Activities#

Explore the cultural history of America! The National Park Service provides information on thousands of places significant in American history, architecture, archeology, engineering, and culture. Click here to learn more: https://www.nps.gov/history/heritage-travel.htm

来源： 美国驻华大使馆