Delve underground into the impressive Nguom Ngao Cave (Tiger Cave), located just a few kilometers from Ban Gioc Waterfall. This vast and beautiful limestone cave system stretches for over 2 kilometers (though only about 1km is open for standard tours) and is filled with spectacular stalactites and stalagmites resembling terraced fields, lotus buds, and mythical creatures.

Walk along the well-lit pathways through large chambers, admiring the intricate natural formations sculpted over millions of years. Exploring Nguom Ngao Cave is often combined with a visit to Ban Gioc Waterfall and is a highlight of Cao Bang's natural wonders.