Saalfeld Fairy Grottoes

The Saalfeld Fairy Grottoes (Saalfelder Feengrotten) in Saalfeld, Thuringia, are a former alum slate mine that has been open to visitors since 1914 and holds the Guinness World Records title of the world's most colorful show grottoes. Underground, mineral formations glow in shades of brown, ocher, red, and green, mirrored in still pools. With a museum, a fairy-tale adventure forest, and a healing tunnel, it is one of the most popular family days out in central Germany.

From mine to fairy grotto

Miners began working here around 1530 hoping to find valuable ore, but found only alum slate. From about 1544 they extracted alum, used for tanning leather, and later vitriol. The "Jeremias Glück" mine operated on and off until 1850. In 1910, a group of doctors and geologists explored the abandoned tunnels, hoping to use the mineral water for a spa, and found that colorful dripstones had grown in less than 300 years. The spectacular "Fairy-Tale Cathedral" (Märchendom) was discovered in December 1913, and the show mine opened the following year. Around 160,000 people visit each year.

What makes it unique

The dripstones are made of a soft mineral called diadochite, nicknamed "mountain butter," which grows far faster than limestone stalactites. More than 45 different minerals create the unusual palette. The highlight of the tour is the Märchendom, where formations are reflected in a pool and staged with light and music. In 2026 the grottoes were nominated for the first time for Germany's "Nature Wonder of the Year" award.

Tickets and opening hours

As of October 2026, according to the official website:

• Show mine and Grottoneum museum: open year-round, including holidays, apart from a short maintenance closure in January. In October 2026, daily 10 a.m.–5 p.m., last tour at 4 p.m.
• Classic or family tour including the museum (about 2 hours): adults €17, reduced €16, children (4–14) €13; family ticket (2 adults + 1 child) €45.
• Combo ticket with the Feenweltchen adventure forest (April–October): adults €29, children €23.

The mine can only be visited on a guided tour. Tours are in German, but free audio guides in English and five other languages are available, and English tours can be booked for groups of 15 or more.

How to get there

Saalfeld lies on the Saale River at the edge of the Thuringian Slate Mountains, roughly 60 km (37 miles) south of Erfurt by road and about 50 km from Jena. Saalfeld (Saale) station is served by Deutsche Bahn, and bus line A runs from the bus station next to it to the grottoes; regional trains and local buses are covered by the Deutschlandticket. Drivers will find about 120 parking spaces on site for €3 per day, plus EV charging.

Is it worth visiting?

Yes, especially with children or on a rainy day. Bring a jacket: it is 8 to 10°C (46 to 50°F) underground all year, with very high humidity. The 550-meter route has about 120 steps and low, narrow passages as little as 1.7 meters (5.6 feet) high, so it is not suitable for wheelchairs, walkers, or strollers; baby carriers can be borrowed for a deposit. Dogs are allowed on a leash outdoors only. Photography is allowed except during the light show.

Nearby

• Saalfeld old town, with medieval town gates and a museum in a former Franciscan monastery.
• Heidecksburg Palace in Rudolstadt, a Baroque palace high above the Saale.
• Hohenwarte Reservoir, part of the lake landscape known as the "Thuringian Sea."