Sengokuhara Hot Spring
It is a famous resort area in Hakone that is rich in nature. At the lake, you can see pampas grass, wild birds, and flora and fauna. There are also colorless and transparent hot springs as well as acidic gypsum springs.
Hakone Yumoto Station (Odakyu Hakone Highway Bus from Shinjuku Station, Haneda Airport, and Yokohama Station)