The area is considered a paradise for researchers and explorers of grottoes and caves; so far only 20 of its 70-km total length has been explored by Vietnamese and British scientists.
INDOCHINA TRAVEL SERVICES CO., LTD.
website: http://www.itsvietnam.com
Address : Suite 1705 - Artex building - 172 Ngoc Khanh, Ba Dinh, Ha Noi, Viet Nam
Tel : + 84 24 62514052
Fax : + 84 24 62514051
Email : info@itsvietnam.com
INDOCHINA TRAVEL SERVICES CO., LTD.
website: http://www.itsvietnam.com
Address : Suite 1705 - Artex building - 172 Ngoc Khanh, Ba Dinh, Ha Noi, Viet Nam
Tel : + 84 24 62514052
Fax : + 84 24 62514051
Email : info@itsvietnam.com
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