Igura-Do

It is a wallpaper photograph of Igura-Do in Niimi-shi, Okayama.

Igura-Do is 90m of vertical intervals and the 1200m [ in full length ] limestone cave which were made by eroding Niimi and the Atetsu plateau which is a karst plateau in Niimi-shi, Okayama. There is an entrance of a limestone cave in the middle of the precipitous cliff which Igura-Do has on the riverside of the upper stream of the Takahashi river which flows through Niimi, and no less than 240m in height corroded by the Takahashi river has. Igura-Do visited this time was discovered for the first time in 1958 (Showa 33), and Niimi furthered development as sightseeing spot in following 1959. The entrance of Igura-Do crosses a river from a parking lot, and begins from the portion of the bottom of a cliff on the opposite shore. Although an entrance portion is a very narrow place, repeating Li who became large gradually from there or became narrow, a karst plateau is gone up upwards and it goes. On the way, through the waterfall in the cave called waterfall of Thijiku called a Kurage rock, Silver Sudare, and 50m of falls here and there, or stalactite, stalagmite and a stone pillar, it becomes near a summit, and carrying out circulation in Hora from there again, altitude is lowered gradually and it goes. Probably because it had carried out in this photography in summer, Igura-Do was very cool and was the touch which is required in a natural refrigerator. It is said that the temperature in a cave leads annually and is just over or below about 15 degrees. All of the strangely shaped rocks in Igura-Do, the waterfall in a cave, etc. are the geographical feature which was able to corrode and do rain water. The Karst topography which is a limestone stratum which makes calcium carbonate the main ingredients over the time said for hundreds of millions years is eroded,A cave goes by being made in the inside gradually, calcium carbonate with the character to be easy to melt into water becomes hard again, stalactite, and stalagmite and a stone pillar are completed, and it is said that it became a present form. Although it is about the photography in Hora of Igura-Do, since it is very dark in the inside of a cave, a tripod becomes indispensable. Moreover, there is a difference of temperature with outside temperature considerably, and cautions in which especially summer and a winter season lose a difference of temperature as much as possible since a lens and the main part of a camera dew very easily are needed. It becomes impossible for Igura-Do to merely have only the spot by which the photography point was restricted to the regrettable thing, to have given the wire net so that it may not be touched, since almost all stalactite is near from an inspection passage, therefore for it to be forced photography over a wire net, or to photograph depending on the case. It gets down at the Chugoku Expressway Niimi interchange, and access to Igura-Do goes the national highway No. 180 line to south. The charge of cave inspection serves as an adult of 1000 yen, and a comparatively higher setup.

Igura's waterfall	The spring of an Igura-Do entrance and the prolongation of life	Kesyo-mawashi	Jellyfish rock
Silver Sudare and gold Sudare	The waterfall of an earth's axis	The sea in Seto	Takebayashi
The valley of a rainbow	The pond of collateral	Dharma Daishi	Clothes of water