the adventure starts at this small l l l l l l l l l l l l l mountain. parked unside is this small train. it's a miniature monorail that was once used for transporting lumberjacks and their equipment. now it works just as hard, but as a tourist attraction. >> translator: the people who come here from the city, it's a novelty. as soon as they see it, they all go wow! >> reporter: visitors come from all over japan to experience the ride up for a start, everyone hasasas pt on a helmet. we going there? no way! >> reporter: at its steepest point, the incline reaches 35 degrees. >> translator: you've got to be kidding! >> reporter: the monorororororo forest. if you're lucky, the driver may stop to let you take some snaps and to give a little lecture on the scenery. >> translator: okay. here's the best photo spot. those moss covered shapes are limestone. they turn like that due to erosion from the rain. >> reporter: they carry on, up to the cave. the magical formations are created by nature. when it's time to head home, another surprise awaits. >> translator: w