http://www.photoblog.hk/wordpress/42631
下次去越南,除了漂亮的法式建築和下龍灣外,就要考慮這個位於廣平省的「韓松洞」(Hang Son Doong)
這洞穴位於「風牙者榜國家公園」,在河內南邊500公里,洞內有極長的走廊,長達150米,高度達到200米,可以容納四十層樓高的大廈
http://www.oxalis.com.vn/GL/en/aboutus/215/ Son Doong cave (in Vietnamese: Hang Sơn Đoòng, meaning Mountain River Cave) is a cave in Phong Nha-Ke Bang National Park, Bo Trach District, Quang Binh Province, Vietnam. The cave is located near the Laos-Vietnam border ( 17°27'25.88"N 106°17'15.36"E). It has a large fast-flowing underground river inside.
The Government of Quang Binh Province has just allowed pilot tours to Son Doong cave, first tourist trip will be some time in the middle of May 2013. This is 7 days trip including 1 day training and fitness test and 6 days in the cave.