Ochtinská Aragonite Cave

Lore & Background

The cave is located at 642 meters above sea level, with a stable microclimate between 7.2 and 7.8°C. This stable microclimate, along with dissolved iron, manganese, and magnesium ions in the slowly dripping water, allows for the formation of ornate aragonite formations. The oldest of these formations are between 120,000 and 130,000 years old, with younger formations being about 14,000 years old.

In the so-called Milky Way Hall, the main attraction of the cave, white branches and clusters of aragonite shine like stars in the Milky Way. The cave was discovered by Martin Cangár and Jiří Prošek in 1954 and opened to the public in 1972.

Reader's Guide

Ochtinská Aragonite Cave is significant for its rare aragonite formations, which are unusual in cave environments. Its inclusion in the UNESCO World Heritage list as part of the Caves of Aggtelek Karst and Slovak Karst site underscores its global importance for demonstrating cave-forming geologic processes. The cave's stable microclimate and specific mineral content create conditions that produce ornate aragonite structures, some dating back over 120,000 years. The Milky Way Hall, with its star-like aragonite clusters, is a notable feature. Discovered in 1954 and opened to the public in 1972, the cave remains a key site for understanding speleogenesis and mineral deposition. Its short length of 300 m belies its scientific and aesthetic value, making it a protected natural monument.

Did You Know?

• The cave is only 300 m long but famous for its rare aragonite formations.
• The oldest aragonite formations are between 120,000 and 130,000 years old.
• The cave was discovered by Martin Cangár and Jiří Prošek in 1954.
• It was opened to the public in 1972.