Phong Nha Caves 1-day itinerary

Start early with a motorbike or shuttle ride to Paradise Cave (Thien Duong), 30km from Phong Nha town. Discovered in 2005 by a local farmer, this is one of the longest dry caves in Asia stretching 31 kilometres into the limestone karst. The first kilometre is open to visitors via a wooden boardwalk that descends into a cathedral-sized chamber. Stalactites and stalagmites hundreds of thousands of years old tower around you — some formations reach 30 metres high. The scale is almost incomprehensible, like walking through the ribcage of a giant stone beast. The extended tour (7km, $45) goes deeper into untouched sections with a guide and headlamp.

Head to Dark Cave (Hang Toi) for the most fun you can have underground in Vietnam. The experience starts with a 400-metre zip-line across the Son River into the cave mouth — a thrilling entry that sets the tone. Inside, you swim and wade through pitch-black water before reaching a mud bath chamber where you coat yourself head to toe in mineral-rich clay. The return journey involves kayaking back across the river. The whole experience is exhilarating and ridiculous in equal measure — expect to be laughing and screaming with strangers. Afterwards, clean off at the riverside swimming area with rope swings and floating platforms.

In the late afternoon, take a dragon boat from the town pier into Phong Nha Cave itself — the original cave that gave the national park its name. The boat motors up the Son River into the gaping cave mouth and drifts through illuminated chambers where stalactites drip from ceilings 40 metres overhead. The river runs through the cave for 8 kilometres, though boats only access the first 1.5km. Back in town, the main strip has cheap beer (3,000–5,000 VND, roughly $0.15–0.20), excellent local restaurants serving com binh dan (rice plates, 30,000 VND), and a growing backpacker scene with hostels running nightly pub crawls.