矿山/洞穴

龙泉洞（第一地下湖）

ryusen-no-no-no-no-no-no-no-no-no-no-no-no-no-no-no-no-no-no-no-no-no-no-no-no-no-no-no-no-no-no-no-no-no-no-no-no-no-no-no no no no no no no -No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-no -No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-no -No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-no -No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-no -No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-no -No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-No-no - 没有no-no-no-no-no-no-no-no-no-no-no-no-no-no-no-no-no-no-no-no-no-no-no-no no no no no no-no no-no-no no-no-no-no-no-no-no-no-no-no-no-no的否则[IWATE县]

您知道位于岩手县下平郡岩泉町的巨大石灰岩洞穴龙泉洞吗？ 它是日本最著名的石灰岩洞穴之一，其全部细节仍然未知......

aoiwa