2007年,美国的天然桥国家保护区被批准为第一个国际暗夜公园。根据波特尔暗夜分类法,天然桥国家保护区的暗夜级别为2级。晚上,这里足够宁静和黑暗,尤其在夏天,星星更数不胜数。夜空中的繁星与公园里的天然石桥遥相呼应,空灵之美难以言表。一些天文摄影师甚至常 In 2007, the Natural Bridge National Reserve in the United States was approved as the first international night park. According to the Porter Night Classification, the Night Level of the Natural Bridge National Reserve is Level 2. In the evening, there is enough silence and darkness, especially in the summer, the stars countless. The stars in the night sky and the natural stone bridge in the park echoes, ethereal beauty unspeakable. Some astronomy photographers even often