INFORMATION

For extended prevention of new coronavirus infectious disease, we assume intracavernous sightseeing route one way.

Doorway is the same place, but exit is different from entrance and, in the case of one way, usually goes along stairs (about 60 steps) by all means.

[information]

・You can see all Lake bottom of the earth to the first … third. Verge to Mihara Ridge that you are watching,
Mihara Pass → Lake first bottom of the earth observation deck → Lake bottom of the earth → We observe exit and Lake bottom of the earth two times and return on the same way.
(in total 272 steps of stairs)
・We go down the sinus in the wrong direction during one way regulation and cannot come back to entrance.
・Distance to original place (entrance) is about 200m after we go out tunnel exit.