The Coves del Drach are a spectacular karst cave system
The Coves del Drach (Caves of Drach) lie near Porto Cristo in the municipality of Manacor on the island of Mallorca and form four interconnected chambers carved in Miocene carbonate rock. The cave system extends roughly 2.4 km and reaches about 25 m below the surface, making it one of the island’s most important show cave
Geology and formation
The caves developed in calcareous (calcite/aragonite) rocks deposited during the Upper Miocene (about 11–5.3 million years ago), originally formed from coral-reef and marine shell deposits; later dissolution by percolating water and karst processes created the chambers, passages, and speleothems (stalactites, stalagmites, flowstone). Speleothem growth rates are slow (roughly 0.2–1.6 mm/year) and the variety of colours on walls reflects different mineral
Lake Martel and hydrology
The caves contain several underground lakes; the largest, Llac Martel (Martel Lake), is the showpiece used for the concluding boat concert. Official descriptions give the lake’s length at about 170 m with depths varying between 4 and 12 m, and water temperatures around 18–19 °C. The lake and submerged passages continue to be the subject of underwater topographic surveys and paleoclimatic research
History and exploration
References to the caves date back to medieval documents (a 14th-century mention) and they were progressively explored and mapped in the 19th century. German explorer M. F. Will mapped parts in 1880; Édouard-Alfred Martel explored further in 1896 and the main lake is named after him. Later improvements (lighting, visitor routes) were installed in the early 20th century
References
en.wikipedia.org
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www.cuevasdeldrach.com
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