Pokemon y u no ep 161 the 3rd victorious cave
The Victorious cave near the Dangi Canyon in Aravan, Kyrgyzstan.
The Victorious cave is 1,200 m (3,900 ft) long and lies further to the east along the northern slope of Hoschan Mountain. The crevice at the watershed of the range leads to a maze of underground passages and cavities created by the rising flow of thermal springs.
References
Victorious cave Wikipedia(Text) CC BY-SA