The most adventurous time you can have in Tottori is definitely climbing mount Mitoku to see the fabled one thousand-year-old hall of Nageiredo.
The way up is treacherous and you have to use your hands to climb the almost vertical path up the mountain. At the base of the climb you can purchase the traditional sandals that Buddhist monks wear to go up the mountain, they are incredibly comfortable to wear. You also need to bring a bottle of water or more since you will sweat a lot going up and need to stay hydrated.
Nature is lush and green and the air is very clean and crisp, and about halfway up there is a platform from where you can see the valley below. Usually, people rest in that area, and continuing up the mountain you will reach a cave through which you must go to be cleansed. On the other side there is a small shrine housing hair pieces from various samurai and sumo wrestlers. They left it there as a gift to the gods of the mountain. Around the corner is the famous hall which looks as if it was thrown into the mountain.
To this day it is unknown how the hall was created in ancient times, and the secret is well kept by the monks of modern times. I would recommend this incredible adventure for everyone interested in nature, hiking, and mysticism, make sure you wear the "waragi" sandals to climb the mountain.