Abukuma cave was discovered while mining for limestones from the current Kamayama quarry in September 1969. In 1973 the inner cavern was developed for tourism then was open to the general public. The route for sightseeing is 600 m. Together with the route closed to the public, it has a total length of 3,300 m. Though that number may change due to investigations in the future. Abukuma cave is presumed to have its limestones crystallized approximately 80 million years ago (the latter cretaceous period).
3D digitizing methods : Photogrammetry
Software : realitycapture
Equipment : Nikon D750,NIKKOR 16-35mm f/4G,SB-910
Images: 988 photos
Date : Mar.2020
Address : Tamura-city, Fukushima-prefecture.Japan.
GoogleMap : https://goo.gl/maps/opazNbD6UBn4A1929