Paradise Cave and Phong Nha Cave Day Trip

What you'll see

Phong Nha-Ke Bang National Park holds the world's largest cave system, and these two are the most accessible. They're very different experiences:

Paradise Cave (Thien Duong)

A 31km-long dry cave discovered in 2005. The first 1km is kitted out with a wooden boardwalk and discreet LED lighting, and it's spectacular — 100-metre-high chambers, stalactites the size of houses, draped curtains of flowstone. Allow 90 minutes to 2 hours.

• Entrance: 250,000 VND
• Walk from car park to cave mouth: 15 minutes uphill (or 120,000 VND return on the electric buggy)
• Photography: allowed, but tripods aren't; bring a fast lens
• Extra 7km trek option: 1,500,000 VND via licensed operator, empties out after the boardwalk ends

Phong Nha Cave

A river cave, reached only by wooden boat up the Son River from Phong Nha town. The approach — 30 minutes drifting past limestone cliffs — is half the point. Inside, the cave runs about 1.2km and ends at a small beach where you can get out and walk another 300 metres.

• Entrance: 150,000 VND per person
• Boat: 550,000 VND per boat (12-person capacity; split the cost at the pier)
• Total time: 2.5 hours including boat both ways
• Photography: tricky in low light; the boat rocks

How to book

• Group day tour — $25–40 for both caves plus transport and lunch. The default for most travellers. Groups of 10–16.
• Private car with driver — 1,100,000–1,500,000 VND for the full day. Stop where you like, including a scenic detour via the Duck Stop or the Botanic Garden.
• Motorbike self-guided — the best option for confident riders. 120,000 VND/day rental. Paradise Cave is 25km from Phong Nha village, straightforward on paved roads.
• Oxalis trekking tours — for the 7km Paradise Cave extension or the harder Hang En trek. Book 1–2 weeks ahead on their website.

Paradise Cave opens 7am–4.30pm. Phong Nha Cave boats run 7am–4pm; last boat back is 5pm.

When to go

Phong Nha has two very distinct seasons:

• February–August — dry, open. All caves accessible. Best conditions are March to May.
• September–November — wet season. The Son River floods; Phong Nha Cave closes for days or weeks at a time. Paradise Cave usually stays open but access roads can be cut.
• December–January — cool, occasionally foggy, quiet. Both caves accessible most days.

Check cave closures with your guesthouse the morning of — water levels change fast in October and November.

Typical cost breakdown

• Paradise Cave entrance: 250,000 VND
• Paradise Cave electric buggy return: 120,000 VND (optional)
• Phong Nha Cave entrance: 150,000 VND
• Phong Nha Cave boat: 550,000 VND per boat (share with others)
• Motorbike fuel: 60,000 VND
• Lunch at The Pub With Cold Beer or a village stall: 150,000 VND
• Group tour with lunch: 650,000–1,000,000 VND ($25–40)

Self-guided two-cave day for two, sharing a boat: around 1,200,000 VND ($48).

Is a Paradise Cave and Phong Nha Cave day trip worth it?

Yes — these are two of the most impressive caves you'll walk into anywhere in Southeast Asia, and the combined day costs less than a mid-range hotel room. Paradise Cave in particular is a properly jaw-drop moment even after the hype.

A few honest calls:

• If you have time for only one, do Paradise.
• If the Son River is flooding, skip Phong Nha Cave and spend the afternoon at the Dark Cave or at a swimming hole.
• Phong Nha is a two- or three-night destination. A single day here feels cramped; plan to stay at least one night in the village.