There are many caves in this limestone mountain area with stalagmites and stalactites, as well as underground rivers and waterfalls. Tu Lan Cave System comprises over 10 caves, some of which were originally discovered and explored in 1992, and some of which were just found in the past couple years.Hang Ton (Ton cave), first found in 1992 and explored more in depth in 2012, appears first on the horizon on a trek to this intricate cave system.There are more than 10 caves in Tu Lan Cave System: Ton Cave, Ken Cave, Kim Cave, Tu Lan Cave, Chuot Cave, Tien Cave, Uoi Cave, Ruc Cave, Secret Cave, Doi Cave, To Mo Cave.
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