August 31, 2015
INSTO Observatories
July 21, 2015
Guanajuato State Tourism Observatory (OTEG)
March 19, 2015
Sustainable Tourism Observatory of Xishuangbanna
March 19, 2015
Sustainable Tourism Observatory of Henan
September 12, 2012
Sustainable Tourism Observatory of Xidi-Hongcun
August 24, 2012
Sustainable Tourism Observatory of Kanas
January 01, 2011
Sustainable Tourism Observatory of Zhangjiajie
February 21, 2008
Sustainable Tourism Observatory of Huangshan
January 01, 2005