After departing the beautifully abandoned Cuc Phuong National Park Resort and stopping to see a few monkeys and turtles, we hopped on bikes to complete the next leg of the journey through Cuc Phuong National Park.
Our main stop during our day of biking was at the Na Mo Cave of Prehistoric Man. From Wikitravel:
The Cave of Prehistoric man is the site of the one of the earliest discoveries of human habitation in Vietnam. Excavated in 1966, the cave revealed human graves, stone axes, pointed bone spears, oyster shell knives, and tools for grinding dating back 7,500 years ago.
Exploring the cave was interesting – it wasn’t particularly difficult to access the entrance – but when we arrived, it was realized that nobody had brought a flashlight or headlamp except for me. I was lucky to have my headlamp with me, but everybody else used the flashes on their smartphones as flashlights – lame, but it worked. In traveling alone through asia, I got to meet all sorts of people – including ones who go caving without a proper light! It was all in good fun, though.