Atta-Höhle

The Atta-Höhle near Attendorn in the southern Sauerland is one of Germany's most-visited show caves, drawing between 150,000 and 200,000 visitors each year. The karst cave system is renowned for the exceptional variety and coloration of its speleothem formations — slender stalactites, broad stalagmites, and shimmering calcite terraces that make it stand out among comparable caves in the country. It was discovered in 1907 during quarrying operations, a remarkably late date given its scale. Guided tours wind through illuminated passages at a constant underground temperature of around 10 °C year-round, making it a particularly welcome visit on hot summer days. The cave is not wheelchair-accessible, but the well-maintained paths suit most visitors including children.