Tatami-ishi Rock Formation (Tatami Mat Rock Formation) along the Kumano-gawa River（Kumano-gawa-no Tatami-ishi）
Underneath the "tatami mat" is a deep river pool
If you take a boat ride down the Kumano-gawa River, which has been listed as a UNESCO World Heritage Site for serving as a river pilgrimage route, numerous scenic spots and odd-shaped rocks appear one after another on both sides of the river. The Tatami-ishi Rock Formation (Tatami Mat Rock Formation) is situated at the foot of Mt. Gongenyama. If you look at the Rock Formation, you feel like you will be pulled into a deep river pool (filled with exuberant water) that is located underneath it.
Get on the Kumano Kotsu Bus at a stop near JR Shingu Station or Kumano Hongu Taisha Grand Shrine, and get off at “Michi-no-Eki Kumano-gawa”[道の駅熊野川] stop. Then, board a river boat (kawabune) from the Kumano-gawa River Traditional Boat Tour Center (Kawabune Center).
Mifune Matsuri Festival – a Finale of the Kumano Taisha Grand Shrine Matsuri Festival (One of the Annual Grand Festivals Held at Kumano Hayatama Taisha Grand Shrine)
（Kumano Hayatama Taisha Reitai-sui, Mifune Matsuri）