Feel the excitement when entering a colonial Japanese-made river cave by tubing at the Nukuwera Tubing Adventure located in Sapat, Tegallalang, Ubud. Take a 45-minute tubing session with our experienced guide.. Exclusive Access to Historic Japanese Caves: The only river tubing experience in Bali that takes you through these ancient wartime caves. Enjoy the excitement of exploring the Japanese colonial historical river cave as well as the gorgeous landscape of Ubud. Tubing lasts 45 minutes and covers about 1.5 kilometers. Use suitable safety equipment before using tubing. Then you will be shuttled to the starting place, which takes about 3 minutes from the parking lot, and before you begin the game, our officers will give you instructions on how to play this tubing game. Afterwards, we will pass through 15 caves, including three dark caves and twelve light caves, as well as four little caves and eleven huge caves, before arriving in Nukuwera. After the game, you can take a shower. We have soap, shampoo, towels, and a changing room available. There are also lockers available for storing your items.