Tour starts at Son Trach Town, boat cruises along past buffalo, limestone peaks and church steeples into cave’s entrance. The illuminated caverns will show themselves before the eyes of visitors. Visitors also can visit Tien Son Cave by climbing 330 steps up the mountainside where the 9th-century Cham altars remain.
To get to Paradise Cave, you must also hire a boat which will bring you into the cave through a narrow waterway. Once you’ve arrived, you’ll get off the boat and can wander on foot to admire the cave. Paradise is beautifully illuminated by colorful lights and you can take good pictures of stalactites and stalagmites.
This trek requires the highest level in terms of physical fitness, endurance and trekking skills. Visitors to Son Doong will have to go through a safety briefing before departure day, still, at any given time, if the tour guide sees you’re not fit for the trip, you’ll be removed from the crew without refund. This just shows how dangerous the trek to Son Doong is. But it gets more and more rewarding once you’ve entered the cave. Tour price is expected to be USD3000, only available from January to August.
Kayaking and Ziplining on Chay River
With an impressive system of rivers, Phong Nha Ke Bang National Park is a great place to discover the caves by kayaking. A thrilling activity to enjoy in Chay river is 400m long ziplining from wildlife observation tower to Dark Cave. You’re allowed to jump off from the zipline into the azure swimming tools below. Chay River has some of the most beautiful and dramatic scenery in Phong Nha Ke Bang National Park. It will be a miss of you skip this wonderfully exciting thing to do when in Phong Nha – Ke Bang.
Dip yourself in the mud bath of Dark Cave
The nature inside Hang Toi (Dark Cave) remains untouched. There is no electricity to illuminate the karst structures of the cave, hence visitors will have to use flashlight helmet during the trip. One very special feature of Dark Cave is mud-bathing in Thuy Tien or Bong Lai Lakes. Mud-bathing is no doubt good for your health, and mud-bathing in a cave gets ten times cooler!Relax in the real heaven on Earth - Nuoc Mooc Stream
The stream is located near to other attractions in Phong Nha - Ke Bang such as Paradise Cave, Chay River and Dark Cave, Nuoc Mooc still remains its beauty with incredible jade green water and the beautiful surrounding. The water of the stream here is cooler than other places, so you shouldn't visit the stream in winter months.
Cuddle with ducks at The Duck Stop
By coming here you'll enjoy the peaceful atmosphere of the countryside and get close to the nature and the little friends - the ducks. You can also try to be a farmer for a day with activities like feeding the ducks and riding a buffalo. The ducks here are trained to not be afraid of the guests and they will actually approach the humans first. It's just a lovely experience over all!Source: https://asianwaytravel.com/phong-nha-ke-bang-national-park-travel-guide/