Many spectacular, meandering, deep green pools of various sizes. Cruises are available through dense virgin forests.
The Sandan Valley is a 16-kilometer-long ravine in northwestern Hiroshima along the Shibaki-gawa River, a tributary of the Ota-gawa River. It is surrounded by deep virgin forests, and is one of the five most famous ravines in Japan. You can enjoy magnificent views there, such as the Kuro-fuchi Pool that meanders for over 100 meters, and the Sarutobi, a narrow passage sandwiched by precipices covered with moss.
At the Sandan-no-taki Falls, or Three-Step Falls, three stages of 30-meter-high waterfalls plunge into the 120-meter long passage with a thunderous roar. It is the best scenic spot in the Sandan Valley. While there is a well-maintained 12-kilometer-long promenade, with just a few ups and downs, leading to the Sandan-no-taki Falls, it is also convenient to take a regular bus (from April to November), running from Sandan-kyo Shomen-guchi (in front of the Sandan Valley) to Deai-bashi Bridge, close to Saruiwa. A riverboat also runs through this ravine. It is utterly thrilling to pass through the Nidan-no-taki Falls and the Sarutobi where the precipices on both sides are just two meters apart!
There are other attractions, such as the Sandankyo-onsen Hot Spring and Mt. Osorakan-zan, where a splendid virgin forest of beech trees covers the entire mountaintop.
From Tokyo:[Air]1h 15 min from Haneda to Hiroshima Airport, and 45 min from the airport to Hiroshima Station by bus.[Rail]4h from Tokyo to Hiroshima Station by JR Tokaido-Sanyo Shinkansen Line. 40 min from Hiroshima to Kabe Station by JR Kabe Line, and 1h 30 min from the station by bus.
From Osaka:[Rail]1h 30 min from Shin-Osaka to Hiroshima Station by Shinkansen.