don't enter outside of the obesrvatory.
Otaki Park (大滝公園) is located at Kinugawa Onsen, Tochigi. It is a riverside park that has a great view of waterfalls and slide. Those interesting shaps of the river are formed an eroded lava by Kinugawa River.
Tourist Info.
There is a parking but no restroom.
Access
0. at Imaichi Station.
1. use Aizu-Kinugawa Line to Kinugawakouen.
2. walk 2 min.
30 min
Let's learn MJER Iaijutsu. 
映画好き集まれ！ 
don't enter outside of the obesrvatory.