Uchimagi Cave, Limestone cave in Kuji, Japan.
Uchimagi Cave is a limestone cave in Kuji with over 6300 meters of underground passages carved by water flowing through the rock. The tunnels branch in multiple directions and display mineral formations throughout their length.
The cave formed over millions of years as underground water dissolved the limestone and created the tunnel network. This geological process continues to shape the passages and structures over time.
The cave represents an essential component of the Sanriku Geopark, contributing to scientific research and educational programs about geological processes.
The interior stays cool year-round, so wear warm clothes and sturdy footwear when inside. Some passages have uneven and slippery surfaces, so walk carefully and allow enough time to explore safely.
Ice stalagmites form in certain sections due to low temperatures and water flow patterns, a rare phenomenon in caves. These frozen formations develop only under very specific conditions within the cave system.
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